Convert string16 to base::string16 in content.

content/public/browser/web_drag_dest_delegate.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_DRAG_DEST_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_DRAG_DEST_DELEGATE_H_
 
 #if defined(TOOLKIT_GTK)
 #include <gtk/gtk.h>
 #endif  // TOOLKIT_GTK
@@ skipping 37 matching lines @@
 #endif
 
 #if defined(TOOLKIT_GTK)
   // Returns the bookmark atom type. GTK and Views return different values here.
   virtual GdkAtom GetBookmarkTargetAtom() const = 0;
 
   // Called when WebDragDestkGtk detects that there's bookmark data in a
   // drag. Not every drag will trigger these.
   virtual void OnReceiveDataFromGtk(GtkSelectionData* data) = 0;
   virtual void OnReceiveProcessedData(const GURL& url,
-                                      const string16& title) = 0;
+                                      const base::string16& title) = 0;
 #elif defined(USE_AURA)
   // Called at the start of every drag to supply the data associated with the
   // drag.
   virtual void OnReceiveDragData(const ui::OSExchangeData& data) = 0;
 #elif defined(OS_WIN)
   // Allows the delegate to set data on the drag. If it doesn't want to set
   // data, it should return false.
   virtual bool AddDragData(const DropData& drop_data,
                            ui::OSExchangeData* data) = 0;
 #endif  // TOOLKIT_GTK
 
   virtual ~WebDragDestDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_DRAG_DEST_DELEGATE_H_