For flex items, percent paddings should resolve against their respective dimension

Source/core/rendering/RenderBoxModelObject.cpp

Index: Source/core/rendering/RenderBoxModelObject.cpp
diff --git a/Source/core/rendering/RenderBoxModelObject.cpp b/Source/core/rendering/RenderBoxModelObject.cpp
index 4137a965a92118d896305488b3af7c227c1b900b..d272789bea1d8575c005135fcc956ef265c3b6d1 100644
--- a/Source/core/rendering/RenderBoxModelObject.cpp
+++ b/Source/core/rendering/RenderBoxModelObject.cpp
@@ -310,11 +310,11 @@ int RenderBoxModelObject::pixelSnappedOffsetHeight() const
     return snapSizeToPixel(offsetHeight(), offsetTop());
 }
 
-LayoutUnit RenderBoxModelObject::computedCSSPadding(const Length& padding) const
+LayoutUnit RenderBoxModelObject::computedCSSPadding(const Length& padding, bool isTopOrBottomOrAfterOrBeforePadding) const
 {
     LayoutUnit w = 0;
     if (padding.isPercent())
-        w = containingBlockLogicalWidthForContent();
+        w = (containingBlock()->isFlexibleBox() && isTopOrBottomOrAfterOrBeforePadding)?containingBlockLogicalHeightForContent():containingBlockLogicalWidthForContent();

[tony, 2014/07/10 17:10:06]

There should be spaces around the ? and :.

[harpreet.sk, 2014/07/14 08:38:07]

Done.

     return minimumValueForLength(padding, w);
 }
 
@@ -2507,6 +2507,11 @@ LayoutUnit RenderBoxModelObject::containingBlockLogicalWidthForContent() const
     return containingBlock()->availableLogicalWidth();
 }
 
+LayoutUnit RenderBoxModelObject::containingBlockLogicalHeightForContent() const
+{
+    return containingBlock()->logicalHeight() - containingBlock()->borderAndPaddingLogicalHeight();

[tony, 2014/07/10 17:10:06]

Does this always work?  We might not have computed the height yet for the
containing block, but I guess in that case we should ignore the percentage
height (since it can't be resolved).

[harpreet.sk, 2014/07/14 08:38:07]

This will not work always. Uploaded new solution. 

+}
+
 RenderBoxModelObject* RenderBoxModelObject::continuation() const
 {
     if (!continuationMap)