Fix BaseRenderingContext2D create/put/get-ImageData() for color managed canvas

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp

Index: third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp
diff --git a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp
index 8f6767796066a44800e8da3a8e5d0c2e5f596026..b536c13b5ea8f0007e8061d1af13813ded7ca463 100644
--- a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp
+++ b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp
@@ -275,6 +275,11 @@ void CanvasRenderingContext2D::willDrawImage(CanvasImageSource* source) const {
   canvas()->willDrawImageTo2DContext(source);
 }
 
+CanvasRenderingContext* CanvasRenderingContext2D::renderingContext() const {
+  return static_cast<CanvasRenderingContext*>(
+      const_cast<CanvasRenderingContext2D*>(this));
+}
+
 ColorBehavior CanvasRenderingContext2D::drawImageColorBehavior() const {
   return CanvasRenderingContext::colorBehaviorForMediaDrawnToCanvas();
 }