Move StyleBackgroundData.h to a nested class in ComputedStyle.

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

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 19 matching lines @@
 #include "core/CSSPropertyNames.h"
 #include "core/ComputedStyleBase.h"
 #include "core/CoreExport.h"
 #include "core/style/BorderValue.h"
 #include "core/style/ComputedStyleConstants.h"
 #include "core/style/CounterDirectives.h"
 #include "core/style/DataRef.h"
 #include "core/style/LineClampValue.h"
 #include "core/style/NinePieceImage.h"
 #include "core/style/SVGComputedStyle.h"
-#include "core/style/StyleBackgroundData.h"
 #include "core/style/StyleBoxData.h"
 #include "core/style/StyleContentAlignmentData.h"
 #include "core/style/StyleDeprecatedFlexibleBoxData.h"
 #include "core/style/StyleDifference.h"
 #include "core/style/StyleFilterData.h"
 #include "core/style/StyleFlexibleBoxData.h"
 #include "core/style/StyleGridData.h"
 #include "core/style/StyleGridItemData.h"
 #include "core/style/StyleInheritedData.h"
 #include "core/style/StyleMultiColData.h"
@@ skipping 124 matching lines @@
   friend class ColorPropertyFunctions;
 
   // FIXME: When we stop resolving currentColor at style time, these can be
   // removed.
   friend class CSSToStyleMap;
   friend class FilterOperationResolver;
   friend class StyleBuilderConverter;
   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
   DataRef<StyleRareInheritedData> rare_inherited_data_;
   DataRef<StyleInheritedData> inherited_data_;
@@ skipping 3493 matching lines @@
       PseudoBitsInternal() | 1 << (pseudo - kFirstPublicPseudoId)));
 }
 
 inline bool ComputedStyle::HasPseudoElementStyle() const {
   return PseudoBitsInternal() & kElementPseudoIdMask;
 }
 
 }  // namespace blink
 
 #endif  // ComputedStyle_h