Add key based scrolling on magnified screen for kiosk 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 101 matching lines @@
 // <F4> puts all other windows into non-immersive fullscreen.
 const char kAshEnableImmersiveFullscreenForBrowserOnly[] =
     "ash-enable-immersive-browser-only";
 
 #if defined(OS_LINUX)
 // Enable memory monitoring.
 const char kAshEnableMemoryMonitor[] = "ash-enable-memory-monitor";
 #endif
 
 #if defined(OS_CHROMEOS)
+// Enables accelerators to control magnified screen.
+const char kAshEnableMagnifierAccelerators[] =
+    "ash-enable-magnifier-accelerators";
+
 // Enables the multi user icons in the system tray.
 const char kAshEnableMultiUserTray[] = "ash-enable-multi-user-tray";
 #endif
 
 // Enables the Oak tree viewer.
 const char kAshEnableOak[] = "ash-enable-oak";
 
 // Enables software based mirroring.
 const char kAshEnableSoftwareMirroring[] = "ash-enable-software-mirroring";
 
@@ skipping 127 matching lines @@
 }
 
 bool UseUsbChargerNotification() {
   return !CommandLine::ForCurrentProcess()->
       HasSwitch(kAshDisableUsbChargerNotification);
 }
 #endif
 
 }  // namespace switches
 }  // namespace ash