Reduce SurfaceIdAllocator usage and tie SurfaceFactory to a single FrameSinkId

services/ui/ws/server_window_surface.h

 // Copyright 2015 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.
 
 #ifndef SERVICES_UI_WS_SERVER_WINDOW_SURFACE_H_
 #define SERVICES_UI_WS_SERVER_WINDOW_SURFACE_H_
 
 #include <set>
 
 #include "base/macros.h"
 #include "cc/ipc/compositor_frame.mojom.h"
+#include "cc/surfaces/frame_sink_id.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_factory_client.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "services/ui/public/interfaces/surface.mojom.h"
 #include "services/ui/public/interfaces/window_tree.mojom.h"
 #include "services/ui/ws/ids.h"
 
 namespace ui {
@@ skipping 31 matching lines @@
   // Destroys old surfaces that have been outdated by a new surface.
   void DestroySurfacesScheduledForDestruction();
 
  private:
   ServerWindow* window();
 
   // SurfaceFactoryClient implementation.
   void ReturnResources(const cc::ReturnedResourceArray& resources) override;
   void SetBeginFrameSource(cc::BeginFrameSource* begin_frame_source) override;
 
+  const cc::FrameSinkId frame_sink_id_;
+
   ServerWindowSurfaceManager* manager_;  // Owns this.
 
   gfx::Size last_submitted_frame_size_;
 
   cc::SurfaceId surface_id_;
   cc::SurfaceIdAllocator surface_id_allocator_;
   cc::SurfaceFactory surface_factory_;
 
   mojom::SurfaceClientPtr client_;
   mojo::Binding<Surface> binding_;
 
   // Set of surface ids that need to be destroyed.
   std::set<cc::SurfaceId> surfaces_scheduled_for_destruction_;
 
   bool may_contain_video_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(ServerWindowSurface);
 };
 
 }  // namespace ws
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_SERVER_WINDOW_SURFACE_H_