Compositing Layer update for OffscreenCanvas resize

content/browser/renderer_host/offscreen_canvas_surface_impl.cc

 // 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.
 
 #include "content/browser/renderer_host/offscreen_canvas_surface_impl.h"
 
 #include <utility>
 
 #include "base/bind_helpers.h"
 #include "cc/surfaces/surface.h"
@@ skipping 15 matching lines @@
   }
 }
 
 // static
 void OffscreenCanvasSurfaceImpl::Create(
     mojo::InterfaceRequest<blink::mojom::OffscreenCanvasSurface> request) {
   mojo::MakeStrongBinding(base::MakeUnique<OffscreenCanvasSurfaceImpl>(),
                           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
     // case, frame_sink_id_ is still unset.
     // As the browser makes no assumption of correct behavior of renderer, in
     // an unwanted situation when this function is invoked twice, we need to
     // unregister the instance from manager.
     OffscreenCanvasSurfaceManager::GetInstance()
         ->UnregisterOffscreenCanvasSurfaceInstance(frame_sink_id_);
     mojo::ReportBadMessage(
         "The same OffscreenCanvasSurfaceImpl is registered to "
         "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);
 
   std::move(callback).Run(surface_id);
 }
 
 void OffscreenCanvasSurfaceImpl::Require(const cc::SurfaceId& surface_id,
                                          const cc::SurfaceSequence& sequence) {
   cc::SurfaceManager* manager = GetSurfaceManager();
   cc::Surface* surface = manager->GetSurfaceForId(surface_id);
   if (!surface) {
     DLOG(ERROR) << "Attempting to require callback on nonexistent surface";
     return;
   }
   surface->AddDestructionDependency(sequence);
 }
 
 void OffscreenCanvasSurfaceImpl::Satisfy(const cc::SurfaceSequence& sequence) {
   std::vector<uint32_t> sequences;
   sequences.push_back(sequence.sequence);
   cc::SurfaceManager* manager = GetSurfaceManager();
   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