Remove dependency on ui from view_manager.

mojo/services/public/cpp/view_manager/view_observer.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_VIEW_OBSERVER_H_
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_OBSERVER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 
 #include "mojo/services/public/cpp/view_manager/view.h"
 #include "mojo/services/public/interfaces/input_events/input_events.mojom.h"
 
-namespace gfx {
-class Rect;
-}
-
 namespace mojo {
 
 class View;
 
 // A note on -ing and -ed suffixes:
 //
 // -ing methods are called before changes are applied to the local view model.
 // -ed methods are called after changes are applied to the local view model.
 //
 // If the change originated from another connection to the view manager, it's
@@ skipping 18 matching lines @@
                                 View* relative_view,
                                 OrderDirection direction) {}
   virtual void OnViewReordered(View* view,
                                View* relative_view,
                                OrderDirection direction) {}
 
   virtual void OnViewDestroying(View* view) {}
   virtual void OnViewDestroyed(View* view) {}
 
   virtual void OnViewBoundsChanging(View* view,
-                                    const gfx::Rect& old_bounds,
-                                    const gfx::Rect& new_bounds) {}
+                                    const Rect& old_bounds,
+                                    const Rect& new_bounds) {}
   virtual void OnViewBoundsChanged(View* view,
-                                   const gfx::Rect& old_bounds,
-                                   const gfx::Rect& new_bounds) {}
+                                   const Rect& old_bounds,
+                                   const Rect& new_bounds) {}
 
   virtual void OnViewFocusChanged(View* gained_focus, View* lost_focus) {}
 
   virtual void OnViewInputEvent(View* view, const EventPtr& event) {}
 
   virtual void OnViewVisibilityChanging(View* view) {}
   virtual void OnViewVisibilityChanged(View* view) {}
 
   // Sent when the drawn state changes. This is only sent for the root nodes
   // when embedded.
   virtual void OnViewDrawnChanging(View* view) {}
   virtual void OnViewDrawnChanged(View* view) {}
 
  protected:
   virtual ~ViewObserver() {}
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_OBSERVER_H_