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 9b7c1ab3015e345633512d83fd8041a1b823e797..d5211e4255d613a45f2d0752206b862ea142fbf7 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -99,6 +99,9 @@ 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);
@@ -188,7 +191,6 @@ 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);