mash: Move ash_switches.* to ash/common; cleanup DEPS.

ash/desktop_background/desktop_background_controller_unittest.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/desktop_background/desktop_background_controller.h"
 
 #include <cmath>
 #include <cstdlib>
 
-#include "ash/ash_switches.h"
+#include "ash/common/ash_switches.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/desktop_background/desktop_background_view.h"
 #include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/test_user_wallpaper_delegate.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
@@ skipping 470 matching lines @@
   {
     SCOPED_TRACE(base::StringPrintf("1200x600/u@1.5 low resolution"));
     controller_->SetWallpaperImage(image_low_res, WALLPAPER_LAYOUT_CENTER);
     WallpaperFitToNativeResolution(
         desktop_background_view(), low_dsf, low_resolution.width(),
         low_resolution.height(), kCustomWallpaperColor);
   }
 }
 
 }  // namespace ash