Rename the aura_shell namespace to ash

ash/wm/workspace/workspace.h

 // 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.
 
 #ifndef ASH_WM_WORKSPACE_H_
 #define ASH_WM_WORKSPACE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "ash/ash_export.h"
 #include "ui/gfx/rect.h"
 
 namespace aura {
 class Window;
 }
 
-namespace aura_shell {
+namespace ash {
 namespace internal {
 
 class WorkspaceManager;
 class WorkspaceTest;
 
 // A workspace is a partial area of the entire desktop (viewport) that
 // is visible to the user at a given time. The size of the workspace is
 // generally the same as the size of the monitor, and the desktop can
 // have multiple workspaces.
 // A workspace contains a limited number of windows and the workspace
@@ skipping 98 matching lines @@
 
   // Windows in the workspace in layout order.
   std::vector<aura::Window*> windows_;
 
   DISALLOW_COPY_AND_ASSIGN(Workspace);
 };
 
 typedef std::vector<Workspace*> Workspaces;
 
 }  // namespace internal
-}  // namespace aura_shell
+}  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_H_