Add embedder api for participating in gpu logic

content/browser/gpu/gpu_process_host.h

Index: content/browser/gpu/gpu_process_host.h
diff --git a/content/browser/gpu/gpu_process_host.h b/content/browser/gpu/gpu_process_host.h
index af4f4d83da8c5282a83c91b69dfd3099312231c4..5091e6ff38d36b174dc968ccaf74d14862f748b1 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -95,6 +95,9 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   CONTENT_EXPORT static void RegisterGpuMainThreadFactory(
       GpuMainThreadFactoryFunction create);
 
+  // BrowserChildProcessHostDelegate implementation.
+  ServiceRegistry* GetServiceRegistry() override;
+
   // Get the GPU process host for the GPU process with the given ID. Returns
   // null if the process no longer exists.
   static GpuProcessHost* FromID(int host_id);
@@ -171,7 +174,6 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   void OnProcessLaunched() override;
   void OnProcessLaunchFailed() override;
   void OnProcessCrashed(int exit_code) override;
-  ServiceRegistry* GetServiceRegistry() override;
 
   // Message handlers.
   void OnInitialized(bool result, const gpu::GPUInfo& gpu_info);