Remove ash-disable-launcher-per-display flag

ash/ash_switches.h

 // 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.
 
 #ifndef ASH_ASH_SWITCHES_H_
 #define ASH_ASH_SWITCHES_H_
 
 #include "ash/ash_export.h"
 
 #include "build/build_config.h"
@@ skipping 10 matching lines @@
 ASH_EXPORT extern const char kAshBootAnimationFunction2[];
 ASH_EXPORT extern const char kAshBootAnimationFunction3[];
 ASH_EXPORT extern const char kAshConstrainPointerToRoot[];
 ASH_EXPORT extern const char kAshCopyHostBackgroundAtBoot[];
 ASH_EXPORT extern const char kAshDebugShortcuts[];
 ASH_EXPORT extern const char kAshDisableAutoMaximizing[];
 ASH_EXPORT extern const char kAshDisableAutoWindowPlacement[];
 ASH_EXPORT extern const char kAshDisableBootAnimation2[];
 ASH_EXPORT extern const char kAshDisableDisplayChangeLimiter[];
 ASH_EXPORT extern const char kAshDisableImmersiveFullscreen[];
-ASH_EXPORT extern const char kAshDisableLauncherPerDisplay[];
 ASH_EXPORT extern const char kAshDisableNewAudioHandler[];
 ASH_EXPORT extern const char kAshDisableNewLockAnimations[];
 ASH_EXPORT extern const char kAshDisableNewNetworkStatusArea[];
 ASH_EXPORT extern const char kAshDisablePerAppLauncher[];
 ASH_EXPORT extern const char kAshDisableUIScaling[];
 ASH_EXPORT extern const char kAshDisableDisplayRotation[];
 ASH_EXPORT extern const char kAshDragAndDropAppListToLauncher[];
 ASH_EXPORT extern const char kAshEnableAudioDeviceMenu[];
 ASH_EXPORT extern const char kAshEnableAdvancedGestures[];
 ASH_EXPORT extern const char kAshEnableBrightnessControl[];
@@ skipping 13 matching lines @@
 ASH_EXPORT extern const char kAuraLegacyPowerButton[];
 #if defined(OS_WIN)
 ASH_EXPORT extern const char kForceAshToDesktop[];
 #endif
 ASH_EXPORT extern const char kForcedMaximizeMode[];
 
 }  // namespace switches
 }  // namespace ash
 
 #endif  // ASH_ASH_SWITCHES_H_