Rename RootWindowHost* to WindowTreeHost*

chrome/browser/ui/ash/chrome_shell_delegate.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 "chrome/browser/ui/ash/chrome_shell_delegate.h"
 
 #include "apps/shell_window.h"
 #include "apps/shell_window_registry.h"
 #include "ash/host/root_window_host_factory.h"
 #include "ash/magnifier/magnifier_constants.h"
@@ skipping 118 matching lines @@
 
 ui::MenuModel* ChromeShellDelegate::CreateContextMenu(aura::Window* root) {
   DCHECK(shelf_delegate_);
   // Don't show context menu for exclusive app runtime mode.
   if (chrome::IsRunningInAppMode())
     return NULL;
 
   return new LauncherContextMenu(shelf_delegate_, root);
 }
 
-ash::RootWindowHostFactory* ChromeShellDelegate::CreateRootWindowHostFactory() {
-  return ash::RootWindowHostFactory::Create();
+ash::WindowTreeHostFactory* ChromeShellDelegate::CreateWindowTreeHostFactory() {
+  return ash::WindowTreeHostFactory::Create();
 }
 
 base::string16 ChromeShellDelegate::GetProductName() const {
   return l10n_util::GetStringUTF16(IDS_PRODUCT_NAME);
 }
 
 keyboard::KeyboardControllerProxy*
     ChromeShellDelegate::CreateKeyboardControllerProxy() {
   return new AshKeyboardControllerProxy();
 }