1 files changed, 287 insertions, 68 deletions

diff --git a/Source/WebCore/rendering/RenderEmbeddedObject.cpp b/Source/WebCore/rendering/RenderEmbeddedObject.cpp
index e964855d7..69e2fd495 100644
--- a/Source/WebCore/rendering/RenderEmbeddedObject.cpp
+++ b/Source/WebCore/rendering/RenderEmbeddedObject.cpp
@@ -24,10 +24,11 @@
 #include "config.h"
 #include "RenderEmbeddedObject.h"
 
+#include "CSSValueKeywords.h"
 #include "Chrome.h"
 #include "ChromeClient.h"
 #include "Cursor.h"
-#include "CSSValueKeywords.h"
+#include "EventHandler.h"
 #include "Font.h"
 #include "FontSelector.h"
 #include "Frame.h"
@@ -38,6 +39,7 @@
 #include "HTMLNames.h"
 #include "HTMLObjectElement.h"
 #include "HTMLParamElement.h"
+#include "HTMLPlugInElement.h"
 #include "HitTestResult.h"
 #include "LocalizedStrings.h"
 #include "MIMETypeRegistry.h"
@@ -45,13 +47,16 @@
 #include "Page.h"
 #include "PaintInfo.h"
 #include "Path.h"
+#include "PlatformMouseEvent.h"
 #include "PluginViewBase.h"
+#include "RenderLayer.h"
 #include "RenderTheme.h"
 #include "RenderView.h"
 #include "RenderWidgetProtector.h"
 #include "Settings.h"
 #include "Text.h"
 #include "TextRun.h"
+#include <wtf/StackStats.h>
 
 #if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
 #include "HTMLMediaElement.h"
@@ -60,29 +65,43 @@
 namespace WebCore {
 
 using namespace HTMLNames;
-    
+
 static const float replacementTextRoundedRectHeight = 18;
 static const float replacementTextRoundedRectLeftRightTextMargin = 6;
-static const float replacementTextRoundedRectOpacity = 0.20f;
-static const float replacementTextPressedRoundedRectOpacity = 0.65f;
+static const float replacementTextRoundedRectBottomTextPadding = 1;
+static const float replacementTextRoundedRectOpacity = 0.8f;
 static const float replacementTextRoundedRectRadius = 5;
-static const float replacementTextTextOpacity = 0.55f;
-static const float replacementTextPressedTextOpacity = 0.65f;
+static const float replacementArrowLeftMargin = 5;
+static const float replacementArrowPadding = 4;
 
 static const Color& replacementTextRoundedRectPressedColor()
 {
-    static const Color lightGray(205, 205, 205);
-    return lightGray;
+    static const Color pressed(205, 205, 205);
+    return pressed;
 }
-    
+
+static const Color& replacementTextRoundedRectColor()
+{
+    static const Color standard(221, 221, 221);
+    return standard;
+}
+
+static const Color& replacementTextColor()
+{
+    static const Color standard(102, 102, 102);
+    return standard;
+}
+
 RenderEmbeddedObject::RenderEmbeddedObject(Element* element)
     : RenderPart(element)
     , m_hasFallbackContent(false)
-    , m_showsUnavailablePluginIndicator(false)
+    , m_isPluginUnavailable(false)
+    , m_isUnavailablePluginIndicatorHidden(false)
     , m_unavailablePluginIndicatorIsPressed(false)
     , m_mouseDownWasInUnavailablePluginIndicator(false)
 {
-    view()->frameView()->setIsVisuallyNonEmpty();
+    // Actual size is not known yet, report the default intrinsic size.
+    view()->frameView()->incrementVisuallyNonEmptyPixelCount(roundedIntSize(intrinsicSize()));
 }
 
 RenderEmbeddedObject::~RenderEmbeddedObject()
@@ -102,7 +121,7 @@ bool RenderEmbeddedObject::requiresLayer() const
 
 bool RenderEmbeddedObject::allowsAcceleratedCompositing() const
 {
-    return widget() && widget()->isPluginViewBase() && static_cast<PluginViewBase*>(widget())->platformLayer();
+    return widget() && widget()->isPluginViewBase() && toPluginViewBase(widget())->platformLayer();
 }
 #endif
 
@@ -117,44 +136,94 @@ static String unavailablePluginReplacementText(RenderEmbeddedObject::PluginUnava
         return blockedPluginByContentSecurityPolicyText();
     case RenderEmbeddedObject::InsecurePluginVersion:
         return insecurePluginVersionText();
-    case RenderEmbeddedObject::PluginInactive:
-        return inactivePluginText();
     }
 
     ASSERT_NOT_REACHED();
     return String();
 }
 
-void RenderEmbeddedObject::setPluginUnavailabilityReason(PluginUnavailabilityReason pluginUnavailabilityReason)
+static bool shouldUnavailablePluginMessageBeButton(Document* document, RenderEmbeddedObject::PluginUnavailabilityReason pluginUnavailabilityReason)
 {
-    ASSERT(!m_showsUnavailablePluginIndicator);
-    m_showsUnavailablePluginIndicator = true;
-    m_pluginUnavailabilityReason = pluginUnavailabilityReason;
+    Page* page = document->page();
+    return page && page->chrome().client()->shouldUnavailablePluginMessageBeButton(pluginUnavailabilityReason);
+}
 
-    m_unavailablePluginReplacementText = unavailablePluginReplacementText(pluginUnavailabilityReason);
+void RenderEmbeddedObject::setPluginUnavailabilityReason(PluginUnavailabilityReason pluginUnavailabilityReason)
+{
+    setPluginUnavailabilityReasonWithDescription(pluginUnavailabilityReason, unavailablePluginReplacementText(pluginUnavailabilityReason));
 }
 
-bool RenderEmbeddedObject::showsUnavailablePluginIndicator() const
+void RenderEmbeddedObject::setPluginUnavailabilityReasonWithDescription(PluginUnavailabilityReason pluginUnavailabilityReason, const String& description)
 {
-    return m_showsUnavailablePluginIndicator;
+    ASSERT(!m_isPluginUnavailable);
+    m_isPluginUnavailable = true;
+    m_pluginUnavailabilityReason = pluginUnavailabilityReason;
+
+    if (description.isEmpty())
+        m_unavailablePluginReplacementText = unavailablePluginReplacementText(pluginUnavailabilityReason);
+    else
+        m_unavailablePluginReplacementText = description;
 }
 
 void RenderEmbeddedObject::setUnavailablePluginIndicatorIsPressed(bool pressed)
 {
     if (m_unavailablePluginIndicatorIsPressed == pressed)
         return;
-    
+
     m_unavailablePluginIndicatorIsPressed = pressed;
     repaint();
 }
 
+void RenderEmbeddedObject::paintSnapshotImage(PaintInfo& paintInfo, const LayoutPoint& paintOffset, Image* image)
+{
+    LayoutUnit cWidth = contentWidth();
+    LayoutUnit cHeight = contentHeight();
+    if (!cWidth || !cHeight)
+        return;
+
+    GraphicsContext* context = paintInfo.context;
+    LayoutSize contentSize(cWidth, cHeight);
+    LayoutPoint contentLocation = location() + paintOffset;
+    contentLocation.move(borderLeft() + paddingLeft(), borderTop() + paddingTop());
+
+    LayoutRect rect(contentLocation, contentSize);
+    IntRect alignedRect = pixelSnappedIntRect(rect);
+    if (alignedRect.width() <= 0 || alignedRect.height() <= 0)
+        return;
+
+    bool useLowQualityScaling = shouldPaintAtLowQuality(context, image, image, alignedRect.size());
+    context->drawImage(image, style()->colorSpace(), alignedRect, CompositeSourceOver, shouldRespectImageOrientation(), useLowQualityScaling);
+}
+
+void RenderEmbeddedObject::paintContents(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+{
+    Element* element = toElement(node());
+    if (!element || !element->isPluginElement())
+        return;
+
+    HTMLPlugInElement* plugInElement = toHTMLPlugInElement(element);
+
+    if (plugInElement->displayState() > HTMLPlugInElement::DisplayingSnapshot) {
+        RenderPart::paintContents(paintInfo, paintOffset);
+        if (!plugInElement->isRestartedPlugin())
+            return;
+    }
+
+    if (!plugInElement->isPlugInImageElement())
+        return;
+
+    Image* snapshot = toHTMLPlugInImageElement(plugInElement)->snapshotImage();
+    if (snapshot)
+        paintSnapshotImage(paintInfo, paintOffset, snapshot);
+}
+
 void RenderEmbeddedObject::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     Page* page = 0;
     if (Frame* frame = this->frame())
         page = frame->page();
 
-    if (showsUnavailablePluginIndicator()) {
+    if (isPluginUnavailable()) {
         if (page && paintInfo.phase == PaintPhaseForeground)
             page->addRelevantUnpaintedObject(this, visualOverflowRect());
         RenderReplaced::paint(paintInfo, paintOffset);
@@ -174,39 +243,66 @@ void RenderEmbeddedObject::paintReplaced(PaintInfo& paintInfo, const LayoutPoint
 
     if (paintInfo.phase == PaintPhaseSelection)
         return;
-    
+
     GraphicsContext* context = paintInfo.context;
     if (context->paintingDisabled())
         return;
-    
+
     FloatRect contentRect;
     Path path;
     FloatRect replacementTextRect;
+    FloatRect arrowRect;
     Font font;
     TextRun run("");
     float textWidth;
-    if (!getReplacementTextGeometry(paintOffset, contentRect, path, replacementTextRect, font, run, textWidth))
+    if (!getReplacementTextGeometry(paintOffset, contentRect, path, replacementTextRect, arrowRect, font, run, textWidth))
         return;
-    
+
     GraphicsContextStateSaver stateSaver(*context);
     context->clip(contentRect);
-    context->setAlpha(m_unavailablePluginIndicatorIsPressed ? replacementTextPressedRoundedRectOpacity : replacementTextRoundedRectOpacity);
-    context->setFillColor(m_unavailablePluginIndicatorIsPressed ? replacementTextRoundedRectPressedColor() : Color::white, style()->colorSpace());
+    context->setAlpha(replacementTextRoundedRectOpacity);
+    context->setFillColor(m_unavailablePluginIndicatorIsPressed ? replacementTextRoundedRectPressedColor() : replacementTextRoundedRectColor(), style()->colorSpace());
     context->fillPath(path);
 
     const FontMetrics& fontMetrics = font.fontMetrics();
     float labelX = roundf(replacementTextRect.location().x() + (replacementTextRect.size().width() - textWidth) / 2);
     float labelY = roundf(replacementTextRect.location().y() + (replacementTextRect.size().height() - fontMetrics.height()) / 2 + fontMetrics.ascent());
-    context->setAlpha(m_unavailablePluginIndicatorIsPressed ? replacementTextPressedTextOpacity : replacementTextTextOpacity);
-    context->setFillColor(Color::black, style()->colorSpace());
+    context->setFillColor(replacementTextColor(), style()->colorSpace());
     context->drawBidiText(font, run, FloatPoint(labelX, labelY));
 }
 
-bool RenderEmbeddedObject::getReplacementTextGeometry(const LayoutPoint& accumulatedOffset, FloatRect& contentRect, Path& path, FloatRect& replacementTextRect, Font& font, TextRun& run, float& textWidth) const
+void RenderEmbeddedObject::setUnavailablePluginIndicatorIsHidden(bool hidden)
+{
+    m_isUnavailablePluginIndicatorHidden = hidden;
+
+    repaint();
+}
+
+static void addReplacementArrowPath(Path& path, const FloatRect& insideRect)
+{
+    FloatRect rect(insideRect);
+    rect.inflate(-replacementArrowPadding);
+
+    FloatPoint center = rect.center();
+    FloatSize arrowEdge(rect.width() / 2, rect.height() / 3);
+    FloatSize arrowHorizontalEdge(arrowEdge.width(), 0);
+    FloatSize arrowVerticalEdge(0, arrowEdge.height());
+
+    path.moveTo(FloatPoint(floorf(center.x()), floorf(rect.y())));
+    path.addLineTo(FloatPoint(floorf(center.x()), floorf(rect.y() + arrowEdge.height())));
+    path.addLineTo(FloatPoint(ceilf(center.x() - arrowEdge.width()), floorf(rect.y() + arrowEdge.height())));
+    path.addLineTo(FloatPoint(ceilf(center.x() - arrowEdge.width()), ceilf(rect.y() + arrowEdge.height() + arrowEdge.height())));
+    path.addLineTo(FloatPoint(floorf(center.x()), ceilf(rect.y() + arrowEdge.height() + arrowEdge.height())));
+    path.addLineTo(FloatPoint(floorf(center.x()), ceilf(rect.y() + arrowEdge.height() + arrowEdge.height() + arrowEdge.height())));
+    path.addLineTo(FloatPoint(ceilf(center.x() + arrowEdge.width()), center.y()));
+    path.closeSubpath();
+}
+
+bool RenderEmbeddedObject::getReplacementTextGeometry(const LayoutPoint& accumulatedOffset, FloatRect& contentRect, Path& path, FloatRect& replacementTextRect, FloatRect& arrowRect, Font& font, TextRun& run, float& textWidth) const
 {
     contentRect = contentBoxRect();
     contentRect.moveBy(roundedIntPoint(accumulatedOffset));
-    
+
     FontDescription fontDescription;
     RenderTheme::defaultTheme()->systemFont(CSSValueWebkitSmallControl, fontDescription);
     fontDescription.setWeight(FontWeightBold);
@@ -221,25 +317,115 @@ bool RenderEmbeddedObject::getReplacementTextGeometry(const LayoutPoint& accumul
 
     run = TextRun(m_unavailablePluginReplacementText);
     textWidth = font.width(run);
-    
+
     replacementTextRect.setSize(FloatSize(textWidth + replacementTextRoundedRectLeftRightTextMargin * 2, replacementTextRoundedRectHeight));
     float x = (contentRect.size().width() / 2 - replacementTextRect.size().width() / 2) + contentRect.location().x();
     float y = (contentRect.size().height() / 2 - replacementTextRect.size().height() / 2) + contentRect.location().y();
     replacementTextRect.setLocation(FloatPoint(x, y));
-    
+
+    replacementTextRect.setHeight(replacementTextRect.height() + replacementTextRoundedRectBottomTextPadding);
+
     path.addRoundedRect(replacementTextRect, FloatSize(replacementTextRoundedRectRadius, replacementTextRoundedRectRadius));
 
+    if (shouldUnavailablePluginMessageBeButton(document(), m_pluginUnavailabilityReason)) {
+        arrowRect = path.boundingRect();
+        arrowRect.setX(ceilf(arrowRect.maxX() + replacementArrowLeftMargin));
+        arrowRect.setWidth(arrowRect.height());
+        arrowRect.inflate(-0.5);
+        path.addEllipse(arrowRect);
+        addReplacementArrowPath(path, arrowRect);
+    }
+
     return true;
 }
 
+LayoutRect RenderEmbeddedObject::unavailablePluginIndicatorBounds(const LayoutPoint& accumulatedOffset) const
+{
+    FloatRect contentRect;
+    Path path;
+    FloatRect replacementTextRect;
+    FloatRect arrowRect;
+    Font font;
+    TextRun run("", 0);
+    float textWidth;
+    if (getReplacementTextGeometry(accumulatedOffset, contentRect, path, replacementTextRect, arrowRect, font, run, textWidth))
+        return LayoutRect(path.boundingRect());
+
+    return LayoutRect();
+}
+
+bool RenderEmbeddedObject::isReplacementObscured() const
+{
+    // Return whether or not the replacement content for blocked plugins is accessible to the user.
+
+    // Check the opacity of each layer containing the element or its ancestors.
+    float opacity = 1.0;
+    for (RenderLayer* layer = enclosingLayer(); layer; layer = layer->parent()) {
+        RenderLayerModelObject* renderer = layer->renderer();
+        RenderStyle* style = renderer->style();
+        opacity *= style->opacity();
+        if (opacity < 0.1)
+            return true;
+    }
+
+    // Calculate the absolute rect for the blocked plugin replacement text.
+    IntRect absoluteBoundingBox = absoluteBoundingBoxRect();
+    LayoutPoint absoluteLocation(absoluteBoundingBox.location());
+    LayoutRect rect = unavailablePluginIndicatorBounds(absoluteLocation);
+    if (rect.isEmpty())
+        return true;
+
+    RenderView* docRenderer = document()->renderView();
+    ASSERT(docRenderer);
+    if (!docRenderer)
+        return true;
+    
+    HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::IgnoreClipping | HitTestRequest::DisallowShadowContent);
+    HitTestResult result;
+    HitTestLocation location;
+    
+    LayoutUnit x = rect.x();
+    LayoutUnit y = rect.y();
+    LayoutUnit width = rect.width();
+    LayoutUnit height = rect.height();
+    
+    // Hit test the center and near the corners of the replacement text to ensure
+    // it is visible and is not masked by other elements.
+    bool hit = false;
+    location = LayoutPoint(x + width / 2, y + height / 2);
+    hit = docRenderer->hitTest(request, location, result);
+    if (!hit || result.innerNode() != node())
+        return true;
+    
+    location = LayoutPoint(x, y);
+    hit = docRenderer->hitTest(request, location, result);
+    if (!hit || result.innerNode() != node())
+        return true;
+    
+    location = LayoutPoint(x + width, y);
+    hit = docRenderer->hitTest(request, location, result);
+    if (!hit || result.innerNode() != node())
+        return true;
+    
+    location = LayoutPoint(x + width, y + height);
+    hit = docRenderer->hitTest(request, location, result);
+    if (!hit || result.innerNode() != node())
+        return true;
+    
+    location = LayoutPoint(x, y + height);
+    hit = docRenderer->hitTest(request, location, result);
+    if (!hit || result.innerNode() != node())
+        return true;
+
+    return false;
+}
+
 void RenderEmbeddedObject::layout()
 {
     StackStats::LayoutCheckPoint layoutCheckPoint;
     ASSERT(needsLayout());
 
-#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
     LayoutSize oldSize = contentBoxRect().size();
-#endif
 
     updateLogicalWidth();
     updateLogicalHeight();
@@ -251,19 +437,42 @@ void RenderEmbeddedObject::layout()
 
     updateLayerTransform();
 
-    if (!widget() && frameView())
+    bool wasMissingWidget = false;
+    if (!widget() && frameView() && canHaveWidget()) {
+        wasMissingWidget = true;
         frameView()->addWidgetToUpdate(this);
+    }
 
     setNeedsLayout(false);
 
-#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    LayoutSize newSize = contentBoxRect().size();
+
+    if (!wasMissingWidget && newSize.width() >= oldSize.width() && newSize.height() >= oldSize.height()) {
+        Element* element = toElement(node());
+        if (element && element->isPluginElement() && toHTMLPlugInElement(element)->isPlugInImageElement()) {
+            HTMLPlugInImageElement* plugInImageElement = toHTMLPlugInImageElement(element);
+            if (plugInImageElement->displayState() > HTMLPlugInElement::DisplayingSnapshot && plugInImageElement->snapshotDecision() == HTMLPlugInImageElement::MaySnapshotWhenResized && document()->view()) {
+                plugInImageElement->setNeedsCheckForSizeChange();
+                document()->view()->addWidgetToUpdate(this);
+            }
+        }
+    }
+
+    if (!canHaveChildren())
+        return;
+
     // This code copied from RenderMedia::layout().
-    RenderBox* controlsRenderer = toRenderBox(m_children.firstChild());
-    if (!controlsRenderer)
+    RenderObject* child = m_children.firstChild();
+
+    if (!child)
         return;
-    
-    LayoutSize newSize = contentBoxRect().size();
-    if (newSize == oldSize && !controlsRenderer->needsLayout())
+
+    RenderBox* childBox = toRenderBox(child);
+
+    if (!childBox)
+        return;
+
+    if (newSize == oldSize && !childBox->needsLayout())
         return;
     
     // When calling layout() on a child node, a parent must either push a LayoutStateMaintainter, or
@@ -271,26 +480,25 @@ void RenderEmbeddedObject::layout()
     // and this method will be called many times per second during playback, use a LayoutStateMaintainer:
     LayoutStateMaintainer statePusher(view(), this, locationOffset(), hasTransform() || hasReflection() || style()->isFlippedBlocksWritingMode());
     
-    controlsRenderer->setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop()));
-    controlsRenderer->style()->setHeight(Length(newSize.height(), Fixed));
-    controlsRenderer->style()->setWidth(Length(newSize.width(), Fixed));
-    controlsRenderer->setNeedsLayout(true, MarkOnlyThis);
-    controlsRenderer->layout();
+    childBox->setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop()));
+    childBox->style()->setHeight(Length(newSize.height(), Fixed));
+    childBox->style()->setWidth(Length(newSize.width(), Fixed));
+    childBox->setNeedsLayout(true, MarkOnlyThis);
+    childBox->layout();
     setChildNeedsLayout(false);
     
     statePusher.pop();
-#endif
 }
 
 void RenderEmbeddedObject::viewCleared()
 {
     // This is required for <object> elements whose contents are rendered by WebCore (e.g. src="foo.html").
     if (node() && widget() && widget()->isFrameView()) {
-        FrameView* view = static_cast<FrameView*>(widget());
+        FrameView* view = toFrameView(widget());
         int marginWidth = -1;
         int marginHeight = -1;
         if (node()->hasTagName(iframeTag)) {
-            HTMLIFrameElement* frame = static_cast<HTMLIFrameElement*>(node());
+            HTMLIFrameElement* frame = toHTMLIFrameElement(node());
             marginWidth = frame->marginWidth();
             marginHeight = frame->marginHeight();
         }
@@ -309,7 +517,7 @@ bool RenderEmbeddedObject::nodeAtPoint(const HitTestRequest& request, HitTestRes
     if (!widget() || !widget()->isPluginViewBase())
         return true;
 
-    PluginViewBase* view = static_cast<PluginViewBase*>(widget());
+    PluginViewBase* view = toPluginViewBase(widget());
     IntPoint roundedPoint = locationInContainer.roundedPoint();
 
     if (Scrollbar* horizontalScrollbar = view->horizontalScrollbar()) {
@@ -334,7 +542,7 @@ bool RenderEmbeddedObject::scroll(ScrollDirection direction, ScrollGranularity g
     if (!widget() || !widget()->isPluginViewBase())
         return false;
 
-    return static_cast<PluginViewBase*>(widget())->scroll(direction, granularity);
+    return toPluginViewBase(widget())->scroll(direction, granularity);
 }
 
 bool RenderEmbeddedObject::logicalScroll(ScrollLogicalDirection direction, ScrollGranularity granularity, float multiplier, Node** stopNode)
@@ -349,34 +557,29 @@ bool RenderEmbeddedObject::isInUnavailablePluginIndicator(const LayoutPoint& poi
     FloatRect contentRect;
     Path path;
     FloatRect replacementTextRect;
+    FloatRect arrowRect;
     Font font;
     TextRun run("");
     float textWidth;
-    return getReplacementTextGeometry(IntPoint(), contentRect, path, replacementTextRect, font, run, textWidth)
-        && path.contains(point);
+    return getReplacementTextGeometry(IntPoint(), contentRect, path, replacementTextRect, arrowRect, font, run, textWidth)
+        && (path.contains(point) || arrowRect.contains(point));
 }
 
 bool RenderEmbeddedObject::isInUnavailablePluginIndicator(MouseEvent* event) const
 {
-    return isInUnavailablePluginIndicator(roundedLayoutPoint(absoluteToLocal(event->absoluteLocation(), UseTransforms | SnapOffsetForTransforms)));
-}
-
-static bool shouldUnavailablePluginMessageBeButton(Document* document, RenderEmbeddedObject::PluginUnavailabilityReason pluginUnavailabilityReason)
-{
-    Page* page = document->page();
-    return page && page->chrome()->client()->shouldUnavailablePluginMessageBeButton(pluginUnavailabilityReason);
+    return isInUnavailablePluginIndicator(roundedLayoutPoint(absoluteToLocal(event->absoluteLocation(), UseTransforms)));
 }
 
 void RenderEmbeddedObject::handleUnavailablePluginIndicatorEvent(Event* event)
 {
     if (!shouldUnavailablePluginMessageBeButton(document(), m_pluginUnavailabilityReason))
         return;
-    
+
     if (!event->isMouseEvent())
         return;
-    
+
     MouseEvent* mouseEvent = static_cast<MouseEvent*>(event);
-    HTMLPlugInElement* element = static_cast<HTMLPlugInElement*>(node());
+    HTMLPlugInElement* element = toHTMLPlugInElement(node());
     if (event->type() == eventNames().mousedownEvent && static_cast<MouseEvent*>(event)->button() == LeftButton) {
         m_mouseDownWasInUnavailablePluginIndicator = isInUnavailablePluginIndicator(mouseEvent);
         if (m_mouseDownWasInUnavailablePluginIndicator) {
@@ -387,7 +590,7 @@ void RenderEmbeddedObject::handleUnavailablePluginIndicatorEvent(Event* event)
             setUnavailablePluginIndicatorIsPressed(true);
         }
         event->setDefaultHandled();
-    }        
+    }
     if (event->type() == eventNames().mouseupEvent && static_cast<MouseEvent*>(event)->button() == LeftButton) {
         if (m_unavailablePluginIndicatorIsPressed) {
             if (Frame* frame = document()->frame()) {
@@ -398,7 +601,7 @@ void RenderEmbeddedObject::handleUnavailablePluginIndicatorEvent(Event* event)
         }
         if (m_mouseDownWasInUnavailablePluginIndicator && isInUnavailablePluginIndicator(mouseEvent)) {
             if (Page* page = document()->page())
-                page->chrome()->client()->unavailablePluginButtonClicked(element, m_pluginUnavailabilityReason);
+                page->chrome().client()->unavailablePluginButtonClicked(element, m_pluginUnavailabilityReason);
         }
         m_mouseDownWasInUnavailablePluginIndicator = false;
         event->setDefaultHandled();
@@ -418,4 +621,20 @@ CursorDirective RenderEmbeddedObject::getCursor(const LayoutPoint& point, Cursor
     return RenderPart::getCursor(point, cursor);
 }
 
+bool RenderEmbeddedObject::canHaveChildren() const
+{
+#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
+    if (!node())
+        return false;
+
+    if (toElement(node())->isMediaElement())
+        return true;
+#endif
+
+    if (isSnapshottedPlugIn())
+        return true;
+
+    return false;
+}
+
 }