Introduce ui/wm/ directory.

apps/shell/app_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_APP_SHELL_BROWSER_MAIN_PARTS_H_
 #define APPS_SHELL_APP_SHELL_BROWSER_MAIN_PARTS_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/browser_main_parts.h"
 
 namespace content {
 class ShellBrowserContext;
 struct MainFunctionParams;
 }
 
-namespace shell {
-class MinimalShell;
-}
-
 namespace views {
 class ViewsDelegate;
 }
 
+namespace wm {
+class MinimalShell;
+}
+
 namespace apps {
 
 // Handles initialization of AppShell.
 class AppShellBrowserMainParts : public content::BrowserMainParts {
  public:
   explicit AppShellBrowserMainParts(
       const content::MainFunctionParams& parameters);
   virtual ~AppShellBrowserMainParts();
 
   // BrowserMainParts overrides.
   virtual void PreEarlyInitialization() OVERRIDE;
   virtual void PreMainMessageLoopStart() OVERRIDE;
   virtual void PostMainMessageLoopStart() OVERRIDE;
   virtual void PreMainMessageLoopRun() OVERRIDE;
   virtual bool MainMessageLoopRun(int* result_code) OVERRIDE;
   virtual void PostMainMessageLoopRun() OVERRIDE;
 
   content::ShellBrowserContext* browser_context() {
     return browser_context_.get();
   }
 
  private:
   scoped_ptr<content::ShellBrowserContext> browser_context_;
 
   // Enable a minimal set of views::corewm to be initialized.
-  scoped_ptr<shell::MinimalShell> minimal_shell_;
+  scoped_ptr<wm::MinimalShell> minimal_shell_;
 
   DISALLOW_COPY_AND_ASSIGN(AppShellBrowserMainParts);
 };
 
 }  // namespace apps
 
 #endif  // APPS_SHELL_APP_SHELL_BROWSER_MAIN_PARTS_H_