Add a switch for tablet power button behavior

chrome/browser/chromeos/login/chrome_restart_request.cc

 // Copyright 2013 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 "chrome/browser/chromeos/login/chrome_restart_request.h"
 
 #include <sys/socket.h>
 #include <vector>
 
 #include "ash/common/ash_switches.h"
@@ skipping 158 matching lines @@
 #if defined(ENABLE_WEBRTC)
     ::switches::kDisableWebRtcHWDecoding,
     ::switches::kDisableWebRtcHWEncoding,
 #endif
     ::switches::kDisableVaapiAcceleratedVideoEncode,
 #if defined(USE_OZONE)
     ::switches::kOzonePlatform,
 #endif
     app_list::switches::kDisableSyncAppList,
     app_list::switches::kEnableSyncAppList,
+    ash::switches::kAshEnableTabletPowerButton,
     ash::switches::kAshEnableTouchView,
     ash::switches::kAshEnablePalette,
     ash::switches::kAshEnablePaletteOnAllDisplays,
     ash::switches::kAshTouchHud,
     ash::switches::kAuraLegacyPowerButton,
     chromeos::switches::kDefaultWallpaperLarge,
     chromeos::switches::kDefaultWallpaperSmall,
     chromeos::switches::kGuestWallpaperLarge,
     chromeos::switches::kGuestWallpaperSmall,
     // Please keep these in alphabetical order. Non-UI Compositor switches
@@ skipping 198 matching lines @@
     // Relaunch chrome without session manager on dev box.
     ReLaunch(command_line);
     return;
   }
 
   // ChromeRestartRequest deletes itself after request sent to session manager.
   (new ChromeRestartRequest(command_line.argv()))->Start();
 }
 
 }  // namespace chromeos