Add observers to FrameSinkManagerHost.

content/browser/renderer_host/offscreen_canvas_provider_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_provider_impl.h"
 
-#include "content/browser/compositor/surface_utils.h"
-#include "content/browser/renderer_host/offscreen_canvas_compositor_frame_sink_manager.h"
 #include "content/browser/renderer_host/offscreen_canvas_surface_impl.h"
 
 namespace content {
 
 OffscreenCanvasProviderImpl::OffscreenCanvasProviderImpl(
     uint32_t renderer_client_id)
     : renderer_client_id_(renderer_client_id) {}
 
 OffscreenCanvasProviderImpl::~OffscreenCanvasProviderImpl() = default;
 
 void OffscreenCanvasProviderImpl::Add(
     blink::mojom::OffscreenCanvasProviderRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
+void OffscreenCanvasProviderImpl::DestroyOffscreenCanvasSurface(
+    const cc::FrameSinkId& frame_sink_id) {
+  surfaces_.erase(frame_sink_id);
+}
+
 void OffscreenCanvasProviderImpl::CreateOffscreenCanvasSurface(
     const cc::FrameSinkId& parent_frame_sink_id,
     const cc::FrameSinkId& frame_sink_id,
     blink::mojom::OffscreenCanvasSurfaceClientPtr client,
     blink::mojom::OffscreenCanvasSurfaceRequest request) {
   // TODO(kylechar): Kill the renderer too.
   if (parent_frame_sink_id.client_id() != renderer_client_id_) {
     DLOG(ERROR) << "Invalid parent client id " << parent_frame_sink_id;
     return;
   }
   if (frame_sink_id.client_id() != renderer_client_id_) {
     DLOG(ERROR) << "Invalid client id " << frame_sink_id;
     return;
   }
 
-  OffscreenCanvasSurfaceImpl::Create(parent_frame_sink_id, frame_sink_id,
-                                     std::move(client), std::move(request));
+  surfaces_[frame_sink_id] = base::MakeUnique<OffscreenCanvasSurfaceImpl>(
+      parent_frame_sink_id, frame_sink_id, this, std::move(client),
+      std::move(request));
 }
 
 void OffscreenCanvasProviderImpl::CreateCompositorFrameSink(
     const cc::FrameSinkId& frame_sink_id,
     cc::mojom::MojoCompositorFrameSinkClientPtr client,
     cc::mojom::MojoCompositorFrameSinkRequest request) {
   // TODO(kylechar): Kill the renderer too.
   if (frame_sink_id.client_id() != renderer_client_id_) {
     DLOG(ERROR) << "Invalid client id " << frame_sink_id;
     return;
   }
 
-  // TODO(kylechar): Add test for bad |frame_sink_id|.
-  auto* manager = OffscreenCanvasCompositorFrameSinkManager::GetInstance();
-  auto* surface_impl = manager->GetSurfaceInstance(frame_sink_id);
-  if (!surface_impl) {
+  auto iter = surfaces_.find(frame_sink_id);
+  if (iter == surfaces_.end()) {
     DLOG(ERROR) << "No OffscreenCanvasSurfaceImpl for " << frame_sink_id;
     return;
   }
 
-  surface_impl->CreateCompositorFrameSink(std::move(client),
+  iter->second->CreateCompositorFrameSink(std::move(client),
                                           std::move(request));
 }
 
 }  // namespace content