Make GetRootWindow() return a Window instead of a RootWindow.

ash/shelf/shelf_view.cc

 // Copyright (c) 2012 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 "ash/shelf/shelf_view.h"
 
 #include <algorithm>
 
 #include "ash/ash_constants.h"
 #include "ash/ash_switches.h"
@@ skipping 309 matching lines @@
       button->ClearState(LauncherButton::STATE_RUNNING);
       button->AddState(LauncherButton::STATE_ATTENTION);
       break;
   }
 }
 
 // Get the event location in screen coordinates.
 gfx::Point GetPositionInScreen(const gfx::Point& root_location,
                                views::View* view) {
   gfx::Point root_location_in_screen = root_location;
-  aura::RootWindow* root_window =
+  aura::Window* root_window =
       view->GetWidget()->GetNativeWindow()->GetRootWindow();
   aura::client::GetScreenPositionClient(root_window->GetRootWindow())->
         ConvertPointToScreen(root_window, &root_location_in_screen);
   return root_location_in_screen;
 }
 
 }  // namespace
 
 // AnimationDelegate used when deleting an item. This steadily decreased the
 // opacity of the layer as the animation progress.
@@ skipping 1553 matching lines @@
       break;
     case ash::SHELF_ALIGNMENT_TOP:
       distance = coordinate.y() - bounds.bottom();
       break;
   }
   return distance > 0 ? distance : 0;
 }
 
 }  // namespace internal
 }  // namespace ash