Start an empty interface OffScreenCanvas

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

Index: third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.h
diff --git a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.h b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.h
new file mode 100644
index 0000000000000000000000000000000000000000..716da5183bc0a96c8b1e3cd2683927b1d80ee0c7
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+++ b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DOffScreenCanvas.h
@@ -0,0 +1,23 @@
+// 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.
+
+#ifndef CanvasRenderingContext2DOffScreenCanvas_h
+#define CanvasRenderingContext2DOffScreenCanvas_h
+
+#include "bindings/modules/v8/UnionTypesModules.h"
+#include "wtf/Allocator.h"
+
+namespace blink {
+
+class CanvasRenderingContext2D;
+
+class CanvasRenderingContext2DOffScreenCanvas {
+    STATIC_ONLY(CanvasRenderingContext2DOffScreenCanvas);
+public:
+    static void canvas(CanvasRenderingContext2D&, HTMLCanvasElementOrOffScreenCanvas&);
+};
+
+} // namespace blink
+
+#endif // CanvasRenderingContext2DOffScreenCanvas_h