Rename RootWindowHost* to WindowTreeHost*

ash/wm/lock_state_controller.cc

 // Copyright 2013 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/wm/lock_state_controller.h"
 
 #include <algorithm>
 
 #include "ash/accessibility_delegate.h"
 #include "ash/ash_switches.h"
@@ skipping 271 matching lines @@
 void LockStateController::OnLockScreenHide(
   base::Callback<void(void)>& callback) {
   StartUnlockAnimationBeforeUIDestroyed(callback);
 }
 
 void LockStateController::SetLockScreenDisplayedCallback(
     const base::Closure& callback) {
   lock_screen_displayed_callback_ = callback;
 }
 
-void LockStateController::OnRootWindowHostCloseRequested(
+void LockStateController::OnWindowTreeHostCloseRequested(
                                                 const aura::RootWindow*) {
   Shell::GetInstance()->delegate()->Exit();
 }
 
 void LockStateController::OnLoginStateChanged(
     user::LoginStatus status) {
   if (status != user::LOGGED_IN_LOCKED)
     login_status_ = status;
   system_is_locked_ = (status == user::LOGGED_IN_LOCKED);
 }
@@ skipping 362 matching lines @@
       unlocked_properties_->background_is_hidden) {
     animator_->StartAnimationWithObserver(
         internal::SessionStateAnimator::DESKTOP_BACKGROUND,
         internal::SessionStateAnimator::ANIMATION_FADE_OUT,
         speed,
         observer);
   }
 }
 
 }  // namespace ash