Generate StyleBackgroundData in ComputedStyleBase.

third_party/WebKit/Source/core/style/ComputedStyle.h

Index: third_party/WebKit/Source/core/style/ComputedStyle.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.h b/third_party/WebKit/Source/core/style/ComputedStyle.h
index 713fd153ca572892b6552669c0cf2c884ade7e3b..77c3d775e6028dac29d47d1b77f050c05da7b302 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -181,40 +181,10 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase,
   friend class StyleResolverState;
   friend class StyleResolver;
 
- private:
-  class StyleBackgroundData : public RefCountedCopyable<StyleBackgroundData> {
-   public:
-    static PassRefPtr<StyleBackgroundData> Create() {
-      return AdoptRef(new StyleBackgroundData);
-    }
-    PassRefPtr<StyleBackgroundData> Copy() const {
-      return AdoptRef(new StyleBackgroundData(*this));
-    }
-
-    bool operator==(const StyleBackgroundData& other) const {
-      return background_ == other.background_ &&
-             background_color_ == other.background_color_;
-    }
-    bool operator!=(const StyleBackgroundData& other) const {
-      return !(*this == other);
-    }
-
-    FillLayer background_;
-    StyleColor background_color_;
-
-   private:
-    StyleBackgroundData()
-        : background_(FillLayer(kBackgroundFillLayer, true)),
-          background_color_(Color::kTransparent) {}
-
-    StyleBackgroundData(const StyleBackgroundData&) = default;
-  };
-
  protected:
   // non-inherited attributes
   DataRef<StyleBoxData> box_data_;
   DataRef<StyleVisualData> visual_data_;
-  DataRef<StyleBackgroundData> background_data_;
   DataRef<StyleRareNonInheritedData> rare_non_inherited_data_;
 
   // inherited attributes