Rename RootWindowHost* to WindowTreeHost*

apps/shell/shell_browser_main_parts.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 "apps/shell/shell_browser_main_parts.h"
 
 #include "apps/shell/shell_browser_context.h"
 #include "apps/shell/shell_extension_system.h"
 #include "apps/shell/shell_extensions_browser_client.h"
 #include "apps/shell/shell_extensions_client.h"
@@ skipping 106 matching lines @@
   extensions::ExtensionsBrowserClient::Set(NULL);
   extensions_browser_client_.reset();
   browser_context_.reset();
   aura::Env::DeleteInstance();
 
   LOG(WARNING) << "-----------------------------------";
   LOG(WARNING) << "app_shell is expected to crash now.";
   LOG(WARNING) << "-----------------------------------";
 }
 
-void ShellBrowserMainParts::OnRootWindowHostCloseRequested(
+void ShellBrowserMainParts::OnWindowTreeHostCloseRequested(
     const aura::RootWindow* root) {
   base::MessageLoop::current()->PostTask(FROM_HERE,
                                          base::MessageLoop::QuitClosure());
 }
 
 void ShellBrowserMainParts::CreateRootWindow() {
   // TODO(jamescook): Replace this with a real Screen implementation.
   gfx::Screen::SetScreenInstance(
       gfx::SCREEN_TYPE_NATIVE, aura::TestScreen::Create());
   // Set up basic pieces of views::corewm.
@@ skipping 35 matching lines @@
     return false;
   }
 
   // TODO(jamescook): Add to ExtensionRegistry.
   // TODO(jamescook): Set ExtensionSystem ready.
   // TODO(jamescook): Send NOTIFICATION_EXTENSION_LOADED.
   return true;
 }
 
 }  // namespace apps