Add switch to enable palette tray UI.

ash/common/ash_switches.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/common/ash_switches.h"
 
 #include "base/command_line.h"
 #include "base/sys_info.h"
 
 namespace ash {
@@ skipping 35 matching lines @@
 #if defined(OS_CHROMEOS)
 // Enables fullscreen app list if Ash is in maximize mode.
 const char kAshEnableFullscreenAppList[] = "ash-enable-fullscreen-app-list";
 
 // Enables key bindings to scroll magnified screen.
 const char kAshEnableMagnifierKeyScroller[] =
     "ash-enable-magnifier-key-scroller";
 
 // Enables unified desktop mode.
 const char kAshEnableUnifiedDesktop[] = "ash-enable-unified-desktop";
+
+// Enables the palette next to the status area.
+const char kAshEnablePalette[] = "ash-enable-palette";
 #endif
 
 // Enables the observation of accelerometer events to enter touch-view mode.
 const char kAshEnableTouchView[] = "enable-touchview";
 
 // Enables mirrored screen.
 const char kAshEnableMirroredScreen[] = "ash-enable-mirrored-screen";
 
 // Enables / disables a stable order between overview sessions, independent of
 // the MRU order which attempts to preserve relative window positions.
@@ skipping 76 matching lines @@
 
   return base::SysInfo::IsRunningOnChromeOS() ||
          base::CommandLine::ForCurrentProcess()->HasSwitch(
              kAshConstrainPointerToRoot);
 }
 
 #endif
 
 }  // namespace switches
 }  // namespace ash