Plumb ViewportMetrics change notifications around the world and back.

mojo/services/view_manager/public/cpp/lib/view_manager_client_impl.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_VIEW_MANAGER_PUBLIC_CPP_LIB_VIEW_MANAGER_CLIENT_IMPL_H_
 #define MOJO_SERVICES_VIEW_MANAGER_PUBLIC_CPP_LIB_VIEW_MANAGER_CLIENT_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 85 matching lines @@
   void OnEmbed(ConnectionSpecificId connection_id,
                const String& creator_url,
                ViewDataPtr root,
                InterfaceRequest<ServiceProvider> services,
                ServiceProviderPtr exposed_services,
                ScopedMessagePipeHandle window_manager_pipe) override;
   void OnEmbeddedAppDisconnected(Id view_id) override;
   void OnViewBoundsChanged(Id view_id,
                            RectPtr old_bounds,
                            RectPtr new_bounds) override;
+  void OnViewViewportMetricsChanged(ViewportMetricsPtr old_metrics,
+                                    ViewportMetricsPtr new_metrics) override;
   void OnViewHierarchyChanged(Id view_id,
                               Id new_parent_id,
                               Id old_parent_id,
                               Array<ViewDataPtr> views) override;
   void OnViewReordered(Id view_id,
                        Id relative_view_id,
                        OrderDirection direction) override;
   void OnViewDeleted(Id view_id) override;
   void OnViewVisibilityChanged(Id view_id, bool visible) override;
   void OnViewDrawnStateChanged(Id view_id, bool drawn) override;
@@ skipping 49 matching lines @@
   Binding<ViewManagerClient> binding_;
   ViewManagerService* service_;
   const bool delete_on_error_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewManagerClientImpl);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_VIEW_MANAGER_PUBLIC_CPP_LIB_VIEW_MANAGER_CLIENT_IMPL_H_