1 files changed, 12 insertions, 7 deletions
diff --git a/Source/WebCore/rendering/RenderSlider.cpp b/Source/WebCore/rendering/RenderSlider.cpp
index d5b90cad6..55df4fdea 100644
--- a/Source/WebCore/rendering/RenderSlider.cpp
+++ b/Source/WebCore/rendering/RenderSlider.cpp
@@ -41,6 +41,7 @@
 #include "StepRange.h"
 #include "StyleResolver.h"
 #include <wtf/MathExtras.h>
+#include <wtf/StackStats.h>
 
 using std::min;
 
@@ -70,6 +71,13 @@ int RenderSlider::baselinePosition(FontBaseline, bool /*firstLine*/, LineDirecti
     return height() + marginTop();
 }
 
+void RenderSlider::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
+{
+    maxLogicalWidth = defaultTrackLength * style()->effectiveZoom();
+    if (!style()->width().isPercent())
+        minLogicalWidth = maxLogicalWidth;
+}
+
 void RenderSlider::computePreferredLogicalWidths()
 {
     m_minPreferredLogicalWidth = 0;
@@ -78,16 +86,13 @@ void RenderSlider::computePreferredLogicalWidths()
     if (style()->width().isFixed() && style()->width().value() > 0)
         m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(style()->width().value());
     else
-        m_maxPreferredLogicalWidth = defaultTrackLength * style()->effectiveZoom();
+        computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
 
     if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) {
         m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->minWidth().value()));
         m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->minWidth().value()));
-    } else if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent()))
-        m_minPreferredLogicalWidth = 0;
-    else
-        m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth;
-    
+    }
+
     if (style()->maxWidth().isFixed()) {
         m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->maxWidth().value()));
         m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->maxWidth().value()));
@@ -109,7 +114,7 @@ void RenderSlider::layout()
     if (thumbBox && thumbBox->isSliderThumb())
         static_cast<RenderSliderThumb*>(thumbBox)->updateAppearance(style());
 
-    RenderBlock::layout();
+    RenderFlexibleBox::layout();
 }
 
 bool RenderSlider::inDragMode() const