ui/web_dialogs: Use base::string16 now that string16 was moved into base namespace.

ui/web_dialogs/web_dialog_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 UI_WEB_DIALOGS_WEB_DIALOG_DELEGATE_H_
 #define UI_WEB_DIALOGS_WEB_DIALOG_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 20 matching lines @@
 
 namespace ui {
 
 // Implement this class to receive notifications.
 class WEB_DIALOGS_EXPORT WebDialogDelegate {
  public:
   // Returns true if the contents needs to be run in a modal dialog.
   virtual ModalType GetDialogModalType() const = 0;
 
   // Returns the title of the dialog.
-  virtual string16 GetDialogTitle() const = 0;
+  virtual base::string16 GetDialogTitle() const = 0;
 
   // Returns the dialog's name identifier. Used to identify this dialog for
   // state restoration.
   virtual std::string GetDialogName() const;
 
   // Get the HTML file path for the content to load in the dialog.
   virtual GURL GetDialogContentURL() const = 0;
 
   // Get WebUIMessageHandler objects to handle messages from the HTML/JS page.
   // The handlers are used to send and receive messages from the page while it
@@ skipping 68 matching lines @@
 
   // Stores the dialog bounds.
   virtual void StoreDialogSize(const gfx::Size& dialog_size) {}
 
   virtual ~WebDialogDelegate() {}
 };
 
 }  // namespace ui
 
 #endif  // UI_WEB_DIALOGS_WEB_DIALOG_DELEGATE_H_