Convert string16 to base::string16 in content.

content/browser/web_contents/web_contents_view_mac.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_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_MAC_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include <string>
@@ skipping 70 matching lines @@
   virtual void SetAllowOverlappingViews(bool overlapping) OVERRIDE;
   virtual bool GetAllowOverlappingViews() const OVERRIDE;
 
   // WebContentsViewPort implementation ----------------------------------------
   virtual void CreateView(
       const gfx::Size& initial_size, gfx::NativeView context) OVERRIDE;
   virtual RenderWidgetHostView* CreateViewForWidget(
       RenderWidgetHost* render_widget_host) OVERRIDE;
   virtual RenderWidgetHostView* CreateViewForPopupWidget(
       RenderWidgetHost* render_widget_host) OVERRIDE;
-  virtual void SetPageTitle(const string16& title) OVERRIDE;
+  virtual void SetPageTitle(const base::string16& title) OVERRIDE;
   virtual void RenderViewCreated(RenderViewHost* host) OVERRIDE;
   virtual void RenderViewSwappedIn(RenderViewHost* host) OVERRIDE;
   virtual void SetOverscrollControllerEnabled(bool enabled) OVERRIDE;
   virtual bool IsEventTracking() const OVERRIDE;
   virtual void CloseTabAfterEventTracking() OVERRIDE;
 
   // Backend implementation of RenderViewHostDelegateView.
   virtual void ShowContextMenu(const ContextMenuParams& params) OVERRIDE;
   virtual void ShowPopupMenu(const gfx::Rect& bounds,
                              int item_height,
@@ skipping 34 matching lines @@
 
   // Whether to allow overlapping views.
   bool allow_overlapping_views_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsViewMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_MAC_H_