Consolidate background fill layer opaqueness into one method

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

Index: third_party/WebKit/Source/core/style/FillLayer.h
diff --git a/third_party/WebKit/Source/core/style/FillLayer.h b/third_party/WebKit/Source/core/style/FillLayer.h
index 90e57fc190bed9cd70efb55baadde8ff9853beee..9948137db215a5636d76011c77b38841770a8e63 100644
--- a/third_party/WebKit/Source/core/style/FillLayer.h
+++ b/third_party/WebKit/Source/core/style/FillLayer.h
@@ -175,7 +175,7 @@ public:
         return m_next ? m_next->hasFixedImage() : false;
     }
 
-    bool hasOpaqueImage(const LayoutObject*) const;
+    bool imageOccludesNextLayers(const LayoutObject&) const;
     bool hasRepeatXY() const;
     bool clipOccludesNextLayers() const;
 
@@ -211,6 +211,9 @@ private:
 
     FillLayer() { }
 
+    bool imageIsOpaque(const LayoutObject&) const;
+    bool imageTilesLayer() const;
+
     FillLayer* m_next;
 
     RefPtrWillBePersistent<StyleImage> m_image;