Implement CSS3TextDecorations runtime flag in favor of CSS3_TEXT

Source/core/rendering/RootInlineBox.h

Index: Source/core/rendering/RootInlineBox.h
diff --git a/Source/core/rendering/RootInlineBox.h b/Source/core/rendering/RootInlineBox.h
index abbfaa1ea11f69991a8dca385ad84ea60570b644..107ceb3b58f39a8104da3be9dcf61838c1aabdd0 100644
--- a/Source/core/rendering/RootInlineBox.h
+++ b/Source/core/rendering/RootInlineBox.h
@@ -181,10 +181,8 @@ public:
         return InlineFlowBox::logicalBottomLayoutOverflow(lineBottom());
     }
 
-#if ENABLE(CSS3_TEXT)
     // Used to calculate the underline offset for TextUnderlinePositionUnder.
     float maxLogicalTop() const { return m_maxLogicalTop; }
-#endif // CSS3_TEXT
 
     Node* getLogicalStartBoxWithNode(InlineBox*&) const;
     Node* getLogicalEndBoxWithNode(InlineBox*&) const;
@@ -220,11 +218,9 @@ private:
     LayoutUnit m_lineTopWithLeading;
     LayoutUnit m_lineBottomWithLeading;
 
-#if ENABLE(CSS3_TEXT)
     // Maximum logicalTop among all children of an InlineFlowBox. Used to
     // calculate the offset for TextUnderlinePositionUnder.
     float m_maxLogicalTop;

[eseidel, 2013/05/13 20:34:34]

I'm just not OK with adding this size to RootInlineBox w/o understanding how
this affects memory.  not lgtm.  sorry.

-#endif // CSS3_TEXT
 
     struct LineFragmentationData {
         WTF_MAKE_NONCOPYABLE(LineFragmentationData); WTF_MAKE_FAST_ALLOCATED;