Reland Submit Compositor Frame from OffscreenCanvas on main

third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom

 // 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.
 
 module blink.mojom;
 
 import "cc/ipc/compositor_frame.mojom";
 import "cc/ipc/surface_id.mojom";
 import "cc/ipc/surface_sequence.mojom";
 
 interface OffscreenCanvasSurface {
   // TODO(619138): Make creation of surface id Async after implementation
   // change on surface_id generator that makes client side be able to generate
   // unique surface_id.id_namespace alone.
   [Sync]
   GetSurfaceId() => (cc.mojom.SurfaceId surface_id);
   RequestSurfaceCreation(cc.mojom.SurfaceId surface_id);
 
   Require(cc.mojom.SurfaceId surface_id, cc.mojom.SurfaceSequence sequence);
   Satisfy(cc.mojom.SurfaceSequence sequence);
-
-  // TODO(563852): Move this function to be in an interface shared by both
-  // worker thread and main thread.
-  // SubmitCompositorFrame(cc.mojom.CompositorFrame compositor_frame);
 };
 
+// This interface is called from either worker or main thread in renderer, but
+// not both for the same OffscreenCanvas instance.
+// TODO(xlai): Make commit() work for worker. See crbug.com/563858.
+interface OffscreenCanvasFrameReceiver {
+
+  SubmitCompositorFrame(cc.mojom.SurfaceId surface_id, cc.mojom.CompositorFrame compositor_frame);
+
+};
+