wstring: convert all SetPageTitle APIs to use string16

chrome/browser/ui/views/tab_contents/native_tab_contents_view.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_UI_VIEWS_TAB_CONTENTS_NATIVE_TAB_CONTENTS_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_NATIVE_TAB_CONTENTS_VIEW_H_
 #pragma once
 
 #include <string>
 
@@ skipping 22 matching lines @@
 
   virtual void InitNativeTabContentsView() = 0;
 
   virtual void Unparent() = 0;
 
   virtual RenderWidgetHostView* CreateRenderWidgetHostView(
       RenderWidgetHost* render_widget_host) = 0;
 
   virtual gfx::NativeWindow GetTopLevelNativeWindow() const = 0;
 
-  virtual void SetPageTitle(const std::wstring& title) = 0;
+  virtual void SetPageTitle(const string16& title) = 0;
 
   virtual void StartDragging(const WebDropData& drop_data,
                              WebKit::WebDragOperationsMask ops,
                              const SkBitmap& image,
                              const gfx::Point& image_offset) = 0;
   virtual void CancelDrag() = 0;
   virtual bool IsDoingDrag() const = 0;
   virtual void SetDragCursor(WebKit::WebDragOperation operation) = 0;
 
   virtual views::NativeWidget* AsNativeWidget() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_NATIVE_TAB_CONTENTS_VIEW_H_