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

Source/core/rendering/RenderLayer.h

Index: Source/core/rendering/RenderLayer.h
diff --git a/Source/core/rendering/RenderLayer.h b/Source/core/rendering/RenderLayer.h
index f2a3fcd4ef6643050b85058b082cb20fd3781145..a0f8cb89ac8b6e9d5c02d5dac4617853a670709c 100644
--- a/Source/core/rendering/RenderLayer.h
+++ b/Source/core/rendering/RenderLayer.h
@@ -619,6 +619,9 @@ private:
     bool hasCompositingDescendant() const { return m_compositingProperties.hasCompositingDescendant; }
     void setHasCompositingDescendant(bool b)  { m_compositingProperties.hasCompositingDescendant = b; }
 
+    bool hasCompositedBlendingDescendants() const { return m_hasCompositedBlendingDescendants; }
+    void setHasCompositedBlendingDescendants(bool b)  { m_hasCompositedBlendingDescendants = b; }
+
     void setCompositingReasons(CompositingReasons reasons) { m_compositingProperties.compositingReasons = reasons; }
     CompositingReasons compositingReasons() const { return m_compositingProperties.compositingReasons; }
 
@@ -680,6 +683,8 @@ protected:
 
     unsigned m_hasFilterInfo : 1;
 
+    unsigned m_hasCompositedBlendingDescendants : 1;
+
     BlendMode m_blendMode;
 
     RenderLayerModelObject* m_renderer;