Replace string16 with base::string16.

chrome/browser/download/download_shelf_context_menu.h

 // Copyright (c) 2011 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 CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SHELF_CONTEXT_MENU_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SHELF_CONTEXT_MENU_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 40 matching lines @@
   ui::SimpleMenuModel* GetMenuModel();
 
   // ui::SimpleMenuModel::Delegate:
   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
   virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE;
   virtual bool GetAcceleratorForCommandId(
       int command_id,
       ui::Accelerator* accelerator) OVERRIDE;
   virtual bool IsItemForCommandIdDynamic(int command_id) const OVERRIDE;
-  virtual string16 GetLabelForCommandId(int command_id) const OVERRIDE;
+  virtual base::string16 GetLabelForCommandId(int command_id) const OVERRIDE;
 
  private:
   // Detaches self from |download_item_|. Called when the DownloadItem is
   // destroyed or when this object is being destroyed.
   void DetachFromDownloadItem();
 
   // content::DownloadItem::Observer
   virtual void OnDownloadDestroyed(content::DownloadItem* download) OVERRIDE;
 
   ui::SimpleMenuModel* GetInProgressMenuModel();
@@ skipping 13 matching lines @@
   // Information source.
   content::DownloadItem* download_item_;
 
   // Used to open tabs.
   content::PageNavigator* navigator_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadShelfContextMenu);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SHELF_CONTEXT_MENU_H_