Remove --ash-disable-overview-mode

ash/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/ash_switches.h"
 
 #include "base/command_line.h"
 
 namespace ash {
 namespace switches {
@@ skipping 50 matching lines @@
 // Disable ability to dock windows at the desktop edge.
 const char kAshDisableDockedWindows[] = "ash-disable-docked-windows";
 
 // Disallow items to be dragged from the app launcher list into the launcher.
 const char kAshDisableDragAndDropAppListToLauncher[] =
     "ash-disable-drag-and-drop-applist-to-launcher";
 
 // Disable dragging items off the shelf to unpin them.
 const char kAshDisableDragOffShelf[] = "ash-disable-drag-off-shelf";
 
-// Disables overview mode for window switching.
-const char kAshDisableOverviewMode[] = "ash-disable-overview-mode";
-
 #if defined(OS_CHROMEOS)
 // Disable the notification when a low-power USB charger is connected.
 const char kAshDisableUsbChargerNotification[] =
     "ash-disable-usb-charger-notification";
 
 // TODO(jamescook): Remove this unused flag. It exists only to allow the
 // "Enable audio device menu" about:flags item to have the tri-state
 // default/enabled/disabled UI.
 const char kAshEnableAudioDeviceMenu[] = "ash-enable-audio-device-menu";
 #endif  // defined(OS_CHROMEOS)
@@ skipping 126 matching lines @@
 bool UseMultiUserTray() {
 #if defined(OS_CHROMEOS)
   // TODO(skuhne): If this gets removed for good, remove also
   // |SystemTray::user_items_| and the use of it.
   return CommandLine::ForCurrentProcess()->HasSwitch(kAshEnableMultiUserTray);
 #else
   return false;
 #endif
 }
 
-bool UseOverviewMode() {
-  return !CommandLine::ForCurrentProcess()->HasSwitch(kAshDisableOverviewMode);
-}
-
 bool UseDockedWindows() {
   return !CommandLine::ForCurrentProcess()->HasSwitch(kAshDisableDockedWindows);
 }
 
 bool ShowAudioDeviceMenu() {
 #if defined(OS_CHROMEOS)
   return !CommandLine::ForCurrentProcess()->
       HasSwitch(kAshDisableAudioDeviceMenu);
 #else
   return false;
 #endif
 }
 
 #if defined(OS_CHROMEOS)
 bool UseUsbChargerNotification() {
   return !CommandLine::ForCurrentProcess()->
       HasSwitch(kAshDisableUsbChargerNotification);
 }
 #endif
 
 }  // namespace switches
 }  // namespace ash