chromeos: Tie tablet power button to --enable-touchview.

ash/wm/power_button_controller.cc

Index: ash/wm/power_button_controller.cc
diff --git a/ash/wm/power_button_controller.cc b/ash/wm/power_button_controller.cc
index 9ea85af9688d4384cadcfba8d1538db73de06d38..3dd54fa2ff65544efdffa071b03b83627f727cc7 100644
--- a/ash/wm/power_button_controller.cc
+++ b/ash/wm/power_button_controller.cc
@@ -44,8 +44,9 @@ PowerButtonController::PowerButtonController(LockStateController* controller)
 #if defined(OS_CHROMEOS)
   chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(
       this);
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kAshEnableTabletPowerButton)) {
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(kAshEnableTouchView) ||
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          kAshEnableTouchViewTesting)) {
     tablet_controller_.reset(
         new TabletPowerButtonController(lock_state_controller_));
   }