Move frame_sink_id management to framesink_manager.cc/h from

content/browser/compositor/gpu_process_transport_factory.h

Index: content/browser/compositor/gpu_process_transport_factory.h
diff --git a/content/browser/compositor/gpu_process_transport_factory.h b/content/browser/compositor/gpu_process_transport_factory.h
index 4024c07bde11ce9aeb8fb7773e345053eb310627..0a8d80e20973ddd65473bfc7ce2f48b98ca78384 100644
--- a/content/browser/compositor/gpu_process_transport_factory.h
+++ b/content/browser/compositor/gpu_process_transport_factory.h
@@ -24,6 +24,7 @@ namespace cc {
 class SingleThreadTaskGraphRunner;
 class SoftwareOutputDevice;
 class SurfaceManager;
+class FrameSinkManager;
 class VulkanInProcessContextProvider;
 }
 
@@ -76,6 +77,7 @@ class GpuProcessTransportFactory : public ui::ContextFactory,
   ui::ContextFactory* GetContextFactory() override;
   ui::ContextFactoryPrivate* GetContextFactoryPrivate() override;
   cc::SurfaceManager* GetSurfaceManager() override;
+  cc::FrameSinkManager* GetFrameSinkManager() override;
   display_compositor::GLHelper* GetGLHelper() override;
   void SetGpuChannelEstablishFactory(
       gpu::GpuChannelEstablishFactory* factory) override;
@@ -103,6 +105,7 @@ class GpuProcessTransportFactory : public ui::ContextFactory,
   SharedVulkanContextProvider();
 
   std::unique_ptr<cc::SurfaceManager> surface_manager_;
+  std::unique_ptr<cc::FrameSinkManager> framesink_manager_;
   uint32_t next_sink_id_ = 1u;
 
 #if defined(OS_WIN)