gpu: Replace more chrome ipc with mojom API.

content/browser/gpu/gpu_process_host_ui_shim.h

Index: content/browser/gpu/gpu_process_host_ui_shim.h
diff --git a/content/browser/gpu/gpu_process_host_ui_shim.h b/content/browser/gpu/gpu_process_host_ui_shim.h
index e8605b8f7156ef1f817020bf5395dd27f582da65..eeb493a87d25225cccafc4244f5d3ce34642e0a9 100644
--- a/content/browser/gpu/gpu_process_host_ui_shim.h
+++ b/content/browser/gpu/gpu_process_host_ui_shim.h
@@ -35,7 +35,6 @@ namespace content {
 void RouteToGpuProcessHostUIShimTask(int host_id, const IPC::Message& msg);
 
 class GpuProcessHostUIShim : public IPC::Listener,
-                             public IPC::Sender,
                              public base::NonThreadSafe {
  public:
   // Create a GpuProcessHostUIShim with the given ID.  The object can be found
@@ -59,9 +58,6 @@ class GpuProcessHostUIShim : public IPC::Listener,
   // Stops the GPU process.
   CONTENT_EXPORT void StopGpuProcess(const base::Closure& callback);
 
-  // IPC::Sender implementation.
-  bool Send(IPC::Message* msg) override;
-
   // IPC::Listener implementation.
   // The GpuProcessHost causes this to be called on the UI thread to
   // dispatch the incoming messages from the GPU process, which are