Implement WebGL's commit on the main thread

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

Index: third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom
diff --git a/third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom b/third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom
index 5faf670d949eda0b7e5f47befef9db02b0972595..4a2a2641e56e87e45b590d75a78653662c419e25 100644
--- a/third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom
+++ b/third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom
@@ -5,6 +5,7 @@
 module blink.mojom;
 
 import "cc/ipc/compositor_frame.mojom";
+import "cc/ipc/returned_resource.mojom";
 import "cc/ipc/surface_id.mojom";
 import "cc/ipc/surface_sequence.mojom";
 
@@ -23,7 +24,12 @@ interface OffscreenCanvasSurface {
 // not both for the same OffscreenCanvas instance.
 interface OffscreenCanvasFrameReceiver {
 
+  SetClient(OffscreenCanvasFrameReceiverClient client);
   SubmitCompositorFrame(cc.mojom.SurfaceId surface_id, cc.mojom.CompositorFrame compositor_frame);
 
 };
 
+interface OffscreenCanvasFrameReceiverClient {
+  ReturnResources(array<cc.mojom.ReturnedResource> resources);

[dcheng, 2016/09/14 20:02:19]

Would it make sense for this to be a generic CC mojo interface? It seems like we
already have SurfaceClient and CompositorFrameSinkClient with the exact same
interface.

[danakj, 2016/09/14 20:07:56]

Not sure if this is helpful but this here *is* a CompositorFrameSinkClient, so
maybe it should use that interface? Maybe it should use CompositorFrameSink too,
not sure if this was considered or is possible.

[xidachen, 2016/09/15 15:56:28]

+Fady: WDYT?

+};
+