mix-blend-mode implementation for accelerated layers - blink part

Source/core/platform/graphics/GraphicsLayer.h

Index: Source/core/platform/graphics/GraphicsLayer.h
diff --git a/Source/core/platform/graphics/GraphicsLayer.h b/Source/core/platform/graphics/GraphicsLayer.h
index ae7a045774ea5a366ad41b24baa51a5e57a9540e..b7cb4c298a251b5d4c20bb8e93586be8758ce53d 100644
--- a/Source/core/platform/graphics/GraphicsLayer.h
+++ b/Source/core/platform/graphics/GraphicsLayer.h
@@ -318,6 +318,12 @@ public:
     float opacity() const { return m_opacity; }
     void setOpacity(float);
 
+    BlendMode blendMode() const { return m_blendMode; }
+    void setBlendMode(BlendMode);
+
+    bool isIsolatedGroupRoot() const { return m_isIsolatedGroupRoot; }
+    void setIsIsolatedGroupRoot(bool);
+
     const FilterOperations& filters() const { return m_filters; }
 
     // Returns true if filter can be rendered by the compositor
@@ -494,6 +500,9 @@ protected:
     float m_opacity;
     float m_zPosition;
 
+    BlendMode m_blendMode;
+    bool m_isIsolatedGroupRoot;
+
     FilterOperations m_filters;
 
     bool m_contentsOpaque : 1;