Clean up StyleBackgroundData.

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 bda342f8f6f20f026bcd18f3065d44959dbc9161..7730ee9b3523a89b8dfb60ac6101efda816bef00 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -417,21 +417,21 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase,
   // background-color
   static Color InitialBackgroundColor() { return Color::kTransparent; }
   void SetBackgroundColor(const StyleColor& v) {
-    SET_VAR(background_data_, color_, v);
+    SET_VAR(background_data_, background_color_, v);
   }
 
   // background-image
   bool HasBackgroundImage() const {
-    return background_data_->Background().HasImage();
+    return background_data_->background_.HasImage();
   }
   bool HasFixedBackgroundImage() const {
-    return background_data_->Background().HasFixedImage();
+    return background_data_->background_.HasFixedImage();
   }
   bool HasEntirelyFixedBackground() const;
 
   // background-clip
   EFillBox BackgroundClip() const {
-    return static_cast<EFillBox>(background_data_->Background().Clip());
+    return static_cast<EFillBox>(background_data_->background_.Clip());
   }
 
   // Border properties.
@@ -3361,7 +3361,7 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase,
     return background_data_.Access()->background_;
   }
   const FillLayer& BackgroundLayers() const {
-    return background_data_->Background();
+    return background_data_->background_;
   }
   void AdjustBackgroundLayers() {
     if (BackgroundLayers().Next()) {
@@ -3496,7 +3496,9 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase,
   StyleColor BorderBottomColor() const {
     return surround_data_->border_.Bottom().GetColor();
   }
-  StyleColor BackgroundColor() const { return background_data_->GetColor(); }
+  StyleColor BackgroundColor() const {
+    return background_data_->background_color_;
+  }
   StyleAutoColor CaretColor() const {
     return rare_inherited_data_->CaretColor();
   }