Establish MojoChildConnection from BrowserChildProcessHostImpl

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 13990d22d9b9691b97da1efa2f55ebebe1c0cdfa..41fc7fac73b91e0a6cf33f75d6c8c1123b297d8e 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -44,11 +44,14 @@ struct GpuPreferences;
 struct SyncToken;
 }
 
+namespace shell {
+class InterfaceProvider;
+}
+
 namespace content {
 class BrowserChildProcessHostImpl;
 class GpuMainThread;
 class InProcessChildThreadParams;
-class MojoChildConnection;
 class RenderWidgetHostViewFrameSubscriber;
 class ShaderDiskCache;
 
@@ -107,8 +110,7 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   CONTENT_EXPORT static void RegisterGpuMainThreadFactory(
       GpuMainThreadFactoryFunction create);
 
-  // BrowserChildProcessHostDelegate implementation.
-  shell::InterfaceProvider* GetRemoteInterfaces() override;
+  shell::InterfaceProvider* GetRemoteInterfaces();
 
   // Get the GPU process host for the GPU process with the given ID. Returns
   // null if the process no longer exists.
@@ -209,8 +211,7 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
                      const std::string& key,
                      const std::string& shader);
 
-  bool LaunchGpuProcess(const std::string& channel_id,
-                        gpu::GpuPreferences* gpu_preferences);
+  bool LaunchGpuProcess(gpu::GpuPreferences* gpu_preferences);
 
   void SendOutstandingReplies();
 
@@ -293,11 +294,6 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
 
   std::string shader_prefix_key_;
 
-  // Browser-side Mojo endpoint which sets up a Mojo channel with the child
-  // process and contains the browser's InterfaceRegistry.
-  const std::string child_token_;
-  std::unique_ptr<MojoChildConnection> mojo_child_connection_;
-
   DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
 };