Embed a simple Mojo shell in content

content/public/common/service_registry.h

Index: content/public/common/service_registry.h
diff --git a/content/public/common/service_registry.h b/content/public/common/service_registry.h
index 1ce3b036673b151134781a119657d4f87bab9dc4..8ff9877d15886eb1b913176224181c7fe8cc7e98 100644
--- a/content/public/common/service_registry.h
+++ b/content/public/common/service_registry.h
@@ -51,13 +51,22 @@ class CONTENT_EXPORT ServiceRegistry {
   }
   virtual void RemoveService(const std::string& service_name) = 0;
 
-  // Connect to an interface provided by the remote service provider.
+  // Connect to an interface provided by the remote service provider. Creates a
+  // new message pipe for this connection.
   template <typename Interface>
   void ConnectToRemoteService(mojo::InterfacePtr<Interface>* ptr) {
     mojo::MessagePipe pipe;
     ptr->Bind(pipe.handle0.Pass());
     ConnectToRemoteService(Interface::Name_, pipe.handle1.Pass());
   }
+
+  // Connect to an interface provided by the remote service provider, using an
+  // existing message pipe.
+  template <typename Interface>
+  void ConnectToRemoteService(mojo::InterfaceRequest<Interface> request) {
+    ConnectToRemoteService(Interface::Name_, request.PassMessagePipe());
+  }
+
   virtual void ConnectToRemoteService(const base::StringPiece& name,
                                       mojo::ScopedMessagePipeHandle handle) = 0;