Rename the aura_shell namespace to ash

ash/drag_drop/drag_drop_controller.cc

 // Copyright (c) 2011 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/drag_drop/drag_drop_controller.h"
 
 #include "ash/drag_drop/drag_image_view.h"
 #include "ash/shell.h"
 #include "base/message_loop.h"
 #include "ui/aura/client/drag_drop_delegate.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/dragdrop/os_exchange_data_provider_aura.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/rect.h"
 #include "ui/views/widget/native_widget_aura.h"
 
-namespace aura_shell {
+namespace ash {
 namespace internal {
 
 using aura::RootWindow;
 
 namespace {
 const gfx::Point kDragDropWidgetOffset(0, 0);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DragDropController, public:
@@ skipping 136 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // DragDropController, private:
 
 void DragDropController::Cleanup() {
   drag_image_.reset();
   drag_data_ = NULL;
   drag_drop_in_progress_ = false;
 }
 
 }  // namespace internal
-}  // namespace aura_shell
+}  // namespace ash