Prefix string16 with base:: in ui/.

ui/views/widget/native_widget_aura.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_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "ui/aura/client/activation_change_observer.h"
@@ skipping 61 matching lines @@
   virtual TooltipManager* GetTooltipManager() const OVERRIDE;
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual bool HasCapture() const OVERRIDE;
   virtual InputMethod* CreateInputMethod() OVERRIDE;
   virtual internal::InputMethodDelegate* GetInputMethodDelegate() OVERRIDE;
   virtual void CenterWindow(const gfx::Size& size) OVERRIDE;
   virtual void GetWindowPlacement(
       gfx::Rect* bounds,
       ui::WindowShowState* maximized) const OVERRIDE;
-  virtual bool SetWindowTitle(const string16& title) OVERRIDE;
+  virtual bool SetWindowTitle(const base::string16& title) OVERRIDE;
   virtual void SetWindowIcons(const gfx::ImageSkia& window_icon,
                               const gfx::ImageSkia& app_icon) OVERRIDE;
   virtual void InitModalType(ui::ModalType modal_type) OVERRIDE;
   virtual gfx::Rect GetWindowBoundsInScreen() const OVERRIDE;
   virtual gfx::Rect GetClientAreaBoundsInScreen() const OVERRIDE;
   virtual gfx::Rect GetRestoredBounds() const OVERRIDE;
   virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE;
   virtual void SetSize(const gfx::Size& size) OVERRIDE;
   virtual void StackAbove(gfx::NativeView native_view) OVERRIDE;
   virtual void StackAtTop() OVERRIDE;
@@ skipping 136 matching lines @@
 
   scoped_ptr<DropHelper> drop_helper_;
   int last_drop_operation_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetAura);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_