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

Source/core/platform/graphics/GraphicsLayer.cpp

Index: Source/core/platform/graphics/GraphicsLayer.cpp
diff --git a/Source/core/platform/graphics/GraphicsLayer.cpp b/Source/core/platform/graphics/GraphicsLayer.cpp
index 6b6505187d94cf264d69571656488d616460a3b2..81f6bb3a3bb6f5ef098b62f906b6d1a1dbad0cdd 100644
--- a/Source/core/platform/graphics/GraphicsLayer.cpp
+++ b/Source/core/platform/graphics/GraphicsLayer.cpp
@@ -109,6 +109,8 @@ GraphicsLayer::GraphicsLayer(GraphicsLayerClient* client)
     , m_anchorPoint(0.5f, 0.5f, 0)
     , m_opacity(1)
     , m_zPosition(0)
+    , m_blendMode(BlendModeNormal)
+    , m_isIsolatedGroupRoot(false)
     , m_contentsOpaque(false)
     , m_preserves3D(false)
     , m_backfaceVisibility(true)
@@ -1016,6 +1018,22 @@ void GraphicsLayer::setOpacity(float opacity)
     platformLayer()->setOpacity(opacity);
 }
 
+void GraphicsLayer::setBlendMode(BlendMode blendMode)
+{
+    if (m_blendMode == blendMode)
+        return;
+    m_blendMode = blendMode;
+    platformLayer()->setBlendMode(WebKit::fromWebCoreBlendMode(blendMode));
+}
+
+void GraphicsLayer::setIsIsolatedGroupRoot(bool isolated)
+{
+    if (m_isIsolatedGroupRoot == isolated)
+        return;
+    m_isIsolatedGroupRoot = isolated;
+    platformLayer()->setIsIsolatedGroupRoot(isolated);
+}
+
 void GraphicsLayer::setContentsNeedsDisplay()
 {
     if (WebLayer* contentsLayer = contentsLayerIfRegistered()) {