Pack StyleColor members in StyleRareInheritedData tighter to save memory

Source/core/rendering/style/StyleRareInheritedData.h

Index: Source/core/rendering/style/StyleRareInheritedData.h
diff --git a/Source/core/rendering/style/StyleRareInheritedData.h b/Source/core/rendering/style/StyleRareInheritedData.h
index b4d080e1a9e54dadf6e86a09c134a252a25594c4..8328781f6e0a3585ea9a8a1ef5e7829f52dbaf17 100644
--- a/Source/core/rendering/style/StyleRareInheritedData.h
+++ b/Source/core/rendering/style/StyleRareInheritedData.h
@@ -58,14 +58,28 @@ public:
 
     RefPtr<StyleImage> listStyleImage;
 
-    StyleColor textStrokeColor;
+    StyleColor textStrokeColor() const { return m_textStrokeColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_textStrokeColor); }
+    StyleColor textFillColor() const { return m_textFillColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_textFillColor); }
+    StyleColor textEmphasisColor() const { return m_textEmphasisColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_textEmphasisColor); }
+    StyleColor visitedLinkTextStrokeColor() const { return m_visitedLinkTextStrokeColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_visitedLinkTextStrokeColor); }
+    StyleColor visitedLinkTextFillColor() const { return m_visitedLinkTextFillColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_visitedLinkTextFillColor); }
+    StyleColor visitedLinkTextEmphasisColor() const { return m_visitedLinkTextEmphasisColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_visitedLinkTextEmphasisColor); }
+
+    void setTextStrokeColor(const StyleColor& color) { m_textStrokeColor = color.resolve(Color()); m_textStrokeColorIsCurrentColor = color.isCurrentColor(); }
+    void setTextFillColor(const StyleColor& color) { m_textFillColor = color.resolve(Color()); m_textFillColorIsCurrentColor = color.isCurrentColor(); }
+    void setTextEmphasisColor(const StyleColor& color) { m_textEmphasisColor = color.resolve(Color()); m_textEmphasisColorIsCurrentColor = color.isCurrentColor(); }
+    void setVisitedLinkTextStrokeColor(const StyleColor& color) { m_visitedLinkTextStrokeColor = color.resolve(Color()); m_visitedLinkTextStrokeColorIsCurrentColor = color.isCurrentColor(); }
+    void setVisitedLinkTextFillColor(const StyleColor& color) { m_visitedLinkTextFillColor = color.resolve(Color()); m_visitedLinkTextFillColorIsCurrentColor = color.isCurrentColor(); }
+    void setVisitedLinkTextEmphasisColor(const StyleColor& color) { m_visitedLinkTextEmphasisColor = color.resolve(Color()); m_visitedLinkTextEmphasisColorIsCurrentColor = color.isCurrentColor(); }
+
+    Color m_textStrokeColor;
     float textStrokeWidth;
-    StyleColor textFillColor;
-    StyleColor textEmphasisColor;
+    Color m_textFillColor;
+    Color m_textEmphasisColor;
 
-    StyleColor visitedLinkTextStrokeColor;
-    StyleColor visitedLinkTextFillColor;
-    StyleColor visitedLinkTextEmphasisColor;
+    Color m_visitedLinkTextStrokeColor;
+    Color m_visitedLinkTextFillColor;
+    Color m_visitedLinkTextEmphasisColor;
 
     RefPtr<ShadowList> textShadow; // Our text shadow information for shadowed text drawing.
     AtomicString highlight; // Apple-specific extension for custom highlight rendering.
@@ -80,6 +94,13 @@ public:
     unsigned m_hasAutoWidows : 1;
     unsigned m_hasAutoOrphans : 1;
 
+    unsigned m_textStrokeColorIsCurrentColor : 1;
+    unsigned m_textFillColorIsCurrentColor : 1;
+    unsigned m_textEmphasisColorIsCurrentColor : 1;
+    unsigned m_visitedLinkTextStrokeColorIsCurrentColor : 1;
+    unsigned m_visitedLinkTextFillColorIsCurrentColor : 1;
+    unsigned m_visitedLinkTextEmphasisColorIsCurrentColor : 1;
+
     unsigned textSecurity : 2; // ETextSecurity
     unsigned userModify : 2; // EUserModify (editing)
     unsigned wordBreak : 2; // EWordBreak