FrameSinkIds use to WindowIds in window server, Process ID/Route ID in renderer

content/browser/compositor/gpu_process_transport_factory.h

 // Copyright 2014 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 CONTENT_BROWSER_COMPOSITOR_GPU_PROCESS_TRANSPORT_FACTORY_H_
 #define CONTENT_BROWSER_COMPOSITOR_GPU_PROCESS_TRANSPORT_FACTORY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 89 matching lines @@
       int num_attempts,
       scoped_refptr<gpu::GpuChannelHost> established_channel_host);
 
   void OnLostMainThreadSharedContextInsideCallback();
   void OnLostMainThreadSharedContext();
 
   scoped_refptr<cc::VulkanInProcessContextProvider>
   SharedVulkanContextProvider();
 
   std::unique_ptr<cc::SurfaceManager> surface_manager_;
-  uint32_t next_surface_client_id_ = 1u;
+  uint32_t next_sink_id_ = 1u;
 
 #if defined(OS_WIN)
   // Used by output surface, stored in PerCompositorData.
   std::unique_ptr<OutputDeviceBacking> software_backing_;
 #endif
 
   // Depends on SurfaceManager.
   typedef std::map<ui::Compositor*, std::unique_ptr<PerCompositorData>>
       PerCompositorDataMap;
   PerCompositorDataMap per_compositor_data_;
@@ skipping 11 matching lines @@
   gpu::GpuChannelEstablishFactory* gpu_channel_factory_ = nullptr;
 
   base::WeakPtrFactory<GpuProcessTransportFactory> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessTransportFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_GPU_PROCESS_TRANSPORT_FACTORY_H_