Pass ServiceProvider thru ViewManagerService::Embed() allowing embedder & embeddee to expose servic…

mojo/services/public/cpp/view_manager/window_manager_delegate.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_WINDOW_MANAGER_DELEGATE_H_
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_WINDOW_MANAGER_DELEGATE_H_
 
+#include "mojo/public/interfaces/application/service_provider.mojom.h"
 #include "mojo/services/public/interfaces/input_events/input_events.mojom.h"
 
 namespace mojo {
 
 class View;
 
 // A WindowManagerDelegate is provided by the application embedded at the
 // service root node.
 class WindowManagerDelegate {
  public:
   // Create an appropriate node to embed |url|.
-  virtual void Embed(const String& url) = 0;
+  virtual void Embed(const String& url,
+                     InterfaceRequest<ServiceProvider> service_provider) {}
 
   // Dispatch the supplied input event to the appropriate view (taking into
   // account focus, activation, modality, etc.).
   virtual void DispatchEvent(View* target, EventPtr event) = 0;
 
  protected:
   virtual ~WindowManagerDelegate() {}
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_WINDOW_MANAGER_DELEGATE_H_