Compositing Layer update for OffscreenCanvas resize

content/browser/renderer_host/offscreen_canvas_surface_impl.cc

Index: content/browser/renderer_host/offscreen_canvas_surface_impl.cc
diff --git a/content/browser/renderer_host/offscreen_canvas_surface_impl.cc b/content/browser/renderer_host/offscreen_canvas_surface_impl.cc
index 29679540fa365f8c20961cffd571b7762c55ddf2..e342fa5974bd414ecb993d5ffe43160c643eee77 100644
--- a/content/browser/renderer_host/offscreen_canvas_surface_impl.cc
+++ b/content/browser/renderer_host/offscreen_canvas_surface_impl.cc
@@ -33,7 +33,9 @@ void OffscreenCanvasSurfaceImpl::Create(
                           std::move(request));
 }
 
-void OffscreenCanvasSurfaceImpl::GetSurfaceId(GetSurfaceIdCallback callback) {
+void OffscreenCanvasSurfaceImpl::GetSurfaceId(
+    blink::mojom::OffscreenCanvasSurfaceClientPtr client,
+    GetSurfaceIdCallback callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   if (frame_sink_id_.is_valid()) {
     // This IPC should be only called once for each HTMLCanvasElement. In this
@@ -48,9 +50,10 @@ void OffscreenCanvasSurfaceImpl::GetSurfaceId(GetSurfaceIdCallback callback) {
         "OffscreenCanvasSurfaceManager twice.");
   }
 
+  client_ = std::move(client);
   frame_sink_id_ = AllocateFrameSinkId();
   cc::SurfaceId surface_id =
-      cc::SurfaceId(frame_sink_id_, id_allocator_->GenerateId());
+      cc::SurfaceId(frame_sink_id_, GenerateLocalFrameId());
 
   OffscreenCanvasSurfaceManager::GetInstance()
       ->RegisterOffscreenCanvasSurfaceInstance(frame_sink_id_, this);
@@ -76,4 +79,11 @@ void OffscreenCanvasSurfaceImpl::Satisfy(const cc::SurfaceSequence& sequence) {
   manager->DidSatisfySequences(sequence.frame_sink_id, &sequences);
 }
 
+void OffscreenCanvasSurfaceImpl::OnSurfaceSizeChanged(
+    const cc::SurfaceId& surface_id,
+    gfx::Size new_surface_size) {
+  client_->OnSurfaceSizeChanged(surface_id, new_surface_size.width(),
+                                new_surface_size.height());
+}
+
 }  // namespace content