Remove PerBrowser launcher, reland step 1 of 2

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 16 matching lines @@
 ASH_EXPORT extern const char kAshDefaultWallpaperLarge[];
 ASH_EXPORT extern const char kAshDefaultWallpaperSmall[];
 #if defined(OS_CHROMEOS)
 ASH_EXPORT extern const char kAshDisableAudioDeviceMenu[];
 #endif
 ASH_EXPORT extern const char kAshDisableAutoMaximizing[];
 ASH_EXPORT extern const char kAshDisableAutoWindowPlacement[];
 ASH_EXPORT extern const char kAshDisableDisplayChangeLimiter[];
 ASH_EXPORT extern const char kAshDisableImmersiveFullscreen[];
 ASH_EXPORT extern const char kAshDisableNewLockAnimations[];
-ASH_EXPORT extern const char kAshDisablePerAppLauncher[];
 ASH_EXPORT extern const char kAshDisableDragAndDropAppListToLauncher[];
 #if defined(OS_CHROMEOS)
 ASH_EXPORT extern const char kAshDisableSoftwareMirroring[];
 ASH_EXPORT extern const char kAshDisableUsbChargerNotification[];
 ASH_EXPORT extern const char kAshEnableAudioDeviceMenu[];
 #endif
 ASH_EXPORT extern const char kAshEnableAdvancedGestures[];
 ASH_EXPORT extern const char kAshEnableBrightnessControl[];
 ASH_EXPORT extern const char kAshEnableDockedWindows[];
 #if defined(OS_LINUX)
@@ skipping 36 matching lines @@
 
 // Returns true if a notification should appear when a low-power USB charger
 // is connected.
 ASH_EXPORT bool UseUsbChargerNotification();
 #endif
 
 }  // namespace switches
 }  // namespace ash
 
 #endif  // ASH_ASH_SWITCHES_H_