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

services/native_viewport/platform_viewport_x11.cc

 // 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.
 
 #include "services/native_viewport/platform_viewport.h"
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/input_events/input_events_type_converters.h"
@@ skipping 144 matching lines @@
 
   scoped_ptr<ui::PlatformEventSource> event_source_;
   scoped_ptr<ui::PlatformWindow> platform_window_;
   Delegate* delegate_;
   mojo::ViewportMetricsPtr metrics_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformViewportX11);
 };
 
 // static
-scoped_ptr<PlatformViewport> PlatformViewport::Create(
-    mojo::ApplicationImpl* application_,
-    Delegate* delegate) {
+scoped_ptr<PlatformViewport> PlatformViewport::Create(mojo::Shell* shell,
+                                                      Delegate* delegate) {
   return make_scoped_ptr(new PlatformViewportX11(delegate));
 }
 
 }  // namespace native_viewport