Start an empty interface OffScreenCanvas

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.cpp

Index: third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.cpp
diff --git a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.cpp b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..9ae29c24c1496c266c9b5f3614133c36bf9d21f7
--- /dev/null
+++ b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.cpp
@@ -0,0 +1,14 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.h"
+
+namespace blink {
+
+void CanvasRenderingContext2DOffScreenCanvas::canvas(CanvasRenderingContext2D& context, HTMLCanvasElementOrOffScreenCanvas& retVal)
+{
+}
+
+} // namespace blink