Convert offscreen canvas to use FrameSinkManagerHost.

content/browser/renderer_host/offscreen_canvas_compositor_frame_sink_manager.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_compositor_frame_sink_manager.h"
 
 #include "base/lazy_instance.h"
 #include "cc/surfaces/surface_manager.h"
 #include "content/browser/compositor/surface_utils.h"
 
@@ skipping 13 matching lines @@
     ~OffscreenCanvasCompositorFrameSinkManager() {
   registered_surface_instances_.clear();
   GetSurfaceManager()->RemoveObserver(this);
 }
 
 OffscreenCanvasCompositorFrameSinkManager*
 OffscreenCanvasCompositorFrameSinkManager::GetInstance() {
   return g_manager.Pointer();
 }
 
-void OffscreenCanvasCompositorFrameSinkManager::RegisterFrameSinkToParent(
-    const cc::FrameSinkId& child_frame_sink_id) {
-  auto surface_iter = registered_surface_instances_.find(child_frame_sink_id);
-  if (surface_iter == registered_surface_instances_.end())
-    return;
-  OffscreenCanvasSurfaceImpl* surfaceImpl = surface_iter->second;
-  if (surfaceImpl->parent_frame_sink_id().is_valid()) {
-    GetSurfaceManager()->RegisterFrameSinkHierarchy(
-        surfaceImpl->parent_frame_sink_id(), child_frame_sink_id);
-  }
-}
-
-void OffscreenCanvasCompositorFrameSinkManager::UnregisterFrameSinkFromParent(
-    const cc::FrameSinkId& child_frame_sink_id) {
-  auto surface_iter = registered_surface_instances_.find(child_frame_sink_id);
-  if (surface_iter == registered_surface_instances_.end())
-    return;
-  OffscreenCanvasSurfaceImpl* surfaceImpl = surface_iter->second;
-  if (surfaceImpl->parent_frame_sink_id().is_valid()) {
-    GetSurfaceManager()->UnregisterFrameSinkHierarchy(
-        surfaceImpl->parent_frame_sink_id(), child_frame_sink_id);
-  }
-}
-
 void OffscreenCanvasCompositorFrameSinkManager::OnSurfaceCreated(
     const cc::SurfaceInfo& surface_info) {
   auto surface_iter =
       registered_surface_instances_.find(surface_info.id().frame_sink_id());
   if (surface_iter == registered_surface_instances_.end())
     return;
-  OffscreenCanvasSurfaceImpl* surfaceImpl = surface_iter->second;
-  surfaceImpl->OnSurfaceCreated(surface_info);
+  OffscreenCanvasSurfaceImpl* surface_impl = surface_iter->second;
+  surface_impl->OnSurfaceCreated(surface_info);
 }
 
 void OffscreenCanvasCompositorFrameSinkManager::
     RegisterOffscreenCanvasSurfaceInstance(
         const cc::FrameSinkId& frame_sink_id,
         OffscreenCanvasSurfaceImpl* surface_instance) {
   DCHECK(surface_instance);
   DCHECK_EQ(registered_surface_instances_.count(frame_sink_id), 0u);
   registered_surface_instances_[frame_sink_id] = surface_instance;
 }
 
 void OffscreenCanvasCompositorFrameSinkManager::
     UnregisterOffscreenCanvasSurfaceInstance(
         const cc::FrameSinkId& frame_sink_id) {
   DCHECK_EQ(registered_surface_instances_.count(frame_sink_id), 1u);
   registered_surface_instances_.erase(frame_sink_id);
 }
 
 OffscreenCanvasSurfaceImpl*
 OffscreenCanvasCompositorFrameSinkManager::GetSurfaceInstance(
     const cc::FrameSinkId& frame_sink_id) {
   auto search = registered_surface_instances_.find(frame_sink_id);
   if (search != registered_surface_instances_.end()) {
     return search->second;
   }
   return nullptr;
 }
 
 }  // namespace content