Remove more GpuMemoryBufferId plumbing

cc/surfaces/surface.h

Index: cc/surfaces/surface.h
diff --git a/cc/surfaces/surface.h b/cc/surfaces/surface.h
index c3226aaa069e2eefa526fcc6e98af20c3b33ce33..e91d0bf6ad418fca3371484788ae52fde2687e00 100644
--- a/cc/surfaces/surface.h
+++ b/cc/surfaces/surface.h
@@ -49,10 +49,6 @@ class CC_SURFACES_EXPORT Surface {
   }
 
   void SetPreviousFrameSurface(Surface* surface);
-  void SetGpuMemoryBufferClientId(int gpu_memory_buffer_client_id);
-  int gpu_memory_buffer_client_id() const {
-    return gpu_memory_buffer_client_id_;
-  }
 
   void QueueFrame(CompositorFrame frame, const DrawCallback& draw_callback);
   void RequestCopyOfOutput(std::unique_ptr<CopyOutputRequest> copy_request);
@@ -101,7 +97,6 @@ class CC_SURFACES_EXPORT Surface {
 
   SurfaceId surface_id_;
   SurfaceId previous_frame_surface_id_;
-  int gpu_memory_buffer_client_id_ = -1;
   base::WeakPtr<SurfaceFactory> factory_;
   // TODO(jamesr): Support multiple frames in flight.
   CompositorFrame current_frame_;