Reland Submit Compositor Frame from OffscreenCanvas on main

third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcher.h

+// Copyright 2016 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 OffscreenCanvasFrameDispatcher_h
+#define OffscreenCanvasFrameDispatcher_h
+
+#include "platform/PlatformExport.h"
+
+namespace blink {
+
+class WebLayer;
+
+class PLATFORM_EXPORT OffscreenCanvasFrameDispatcher {
+public:
+    virtual ~OffscreenCanvasFrameDispatcher() {};
+    virtual void dispatchFrame() = 0;
+};
+
+} // namespace blink
+
+#endif // OffscreenCanvasFrameDispatcher_h