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..8038dec9773b09ea2cff8642cdfad5d6debaad7e 100644
--- a/ash/wm/power_button_controller.cc
+++ b/ash/wm/power_button_controller.cc
@@ -45,7 +45,9 @@ PowerButtonController::PowerButtonController(LockStateController* controller)
   chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(
       this);
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kAshEnableTabletPowerButton)) {
+          switches::kAshEnableTouchView) ||
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kAshEnableTouchViewTesting)) {
     tablet_controller_.reset(
         new TabletPowerButtonController(lock_state_controller_));
   }