Make PlatformViewport and NativeViewportImpl use Shell* instead of ApplicationImpl*.

services/native_viewport/platform_viewport.h

 // Copyright 2013 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 SERVICES_NATIVE_VIEWPORT_PLATFORM_VIEWPORT_H_
 #define SERVICES_NATIVE_VIEWPORT_PLATFORM_VIEWPORT_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "mojo/services/input_events/interfaces/input_events.mojom.h"
 #include "mojo/services/native_viewport/interfaces/native_viewport.mojom.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace mojo {
-class ApplicationImpl;
+class Shell;
 }
 
 namespace native_viewport {
 
 // Encapsulation of platform-specific Viewport.
 class PlatformViewport {
  public:
   class Delegate {
    public:
     virtual ~Delegate() {}
 
     virtual void OnMetricsChanged(mojo::ViewportMetricsPtr metrics) = 0;
     virtual void OnAcceleratedWidgetAvailable(
         gfx::AcceleratedWidget widget) = 0;
     virtual void OnAcceleratedWidgetDestroyed() = 0;
     virtual bool OnEvent(mojo::EventPtr event) = 0;
     virtual void OnDestroyed() = 0;
   };
 
   virtual ~PlatformViewport() {}
 
   virtual void Init(const gfx::Rect& bounds) = 0;
   virtual void Show() = 0;
   virtual void Hide() = 0;
   virtual void Close() = 0;
   virtual gfx::Size GetSize() = 0;
   virtual void SetBounds(const gfx::Rect& bounds) = 0;
 
-  static scoped_ptr<PlatformViewport> Create(mojo::ApplicationImpl* application,
+  // TODO(vtl): Maybe this should take an
+  // |InterfaceHandle<ApplicationConnector>| instead of a |Shell*|.
+  static scoped_ptr<PlatformViewport> Create(mojo::Shell* shell,
                                              Delegate* delegate);
 };
 
 }  // namespace native_viewport
 
 #endif  // SERVICES_NATIVE_VIEWPORT_PLATFORM_VIEWPORT_H_