Add base:: to string16 in content/.

content/public/browser/web_contents_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_CONTENTS_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 437 matching lines @@
   // This is optional for implementations of WebContentsDelegate; if the
   // delegate doesn't provide a size, the current WebContentsView's size will be
   // used.
   virtual gfx::Size GetSizeForNewRenderView(
       const WebContents* web_contents) const;
 
   // Notification that validation of a form displayed by the |web_contents|
   // has failed. There can only be one message per |web_contents| at a time.
   virtual void ShowValidationMessage(WebContents* web_contents,
                                      const gfx::Rect& anchor_in_root_view,
-                                     const string16& main_text,
-                                     const string16& sub_text) {}
+                                     const base::string16& main_text,
+                                     const base::string16& sub_text) {}
 
   // Notification that the delegate should hide any showing form validation
   // message.
   virtual void HideValidationMessage(WebContents* web_contents) {}
 
   // Notification that the form element that triggered the validation failure
   // has moved.
   virtual void MoveValidationMessage(WebContents* web_contents,
                                      const gfx::Rect& anchor_in_root_view) {}
 
  protected:
   virtual ~WebContentsDelegate();
 
  private:
   friend class WebContentsImpl;
 
   // Called when |this| becomes the WebContentsDelegate for |source|.
   void Attach(WebContents* source);
 
   // Called when |this| is no longer the WebContentsDelegate for |source|.
   void Detach(WebContents* source);
 
   // The WebContents that this is currently a delegate for.
   std::set<WebContents*> attached_contents_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_