Rename RootWindowHost* to WindowTreeHost*

apps/shell/shell_browser_main_parts.h

 // 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.
 
 #ifndef APPS_SHELL_SHELL_BROWSER_MAIN_PARTS_H_
 #define APPS_SHELL_SHELL_BROWSER_MAIN_PARTS_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 38 matching lines @@
   // BrowserMainParts overrides.
   virtual void PreEarlyInitialization() OVERRIDE;
   virtual void PreMainMessageLoopStart() OVERRIDE;
   virtual void PostMainMessageLoopStart() OVERRIDE;
   virtual int PreCreateThreads() OVERRIDE;
   virtual void PreMainMessageLoopRun() OVERRIDE;
   virtual bool MainMessageLoopRun(int* result_code) OVERRIDE;
   virtual void PostMainMessageLoopRun() OVERRIDE;
 
   // aura::RootWindowObserver overrides:
-  virtual void OnRootWindowHostCloseRequested(const aura::RootWindow* root)
+  virtual void OnWindowTreeHostCloseRequested(const aura::RootWindow* root)
       OVERRIDE;
 
  private:
   // Creates the window that hosts the apps.
   void CreateRootWindow();
 
   // Closes and destroys the root window hosting the app.
   void DestroyRootWindow();
 
   // Creates and initializes the ExtensionSystem.
@@ skipping 12 matching lines @@
 
   // Owned by the BrowserContextKeyedService system.
   extensions::ShellExtensionSystem* extension_system_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellBrowserMainParts);
 };
 
 }  // namespace apps
 
 #endif  // APPS_SHELL_SHELL_BROWSER_MAIN_PARTS_H_