Prefix string16 with base:: in ui/.

ui/views/controls/scrollbar/base_scroll_bar.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_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_H_
 
 #include "base/gtest_prod_util.h"
 #include "ui/views/animation/scroll_animator.h"
 #include "ui/views/context_menu_controller.h"
@@ skipping 75 matching lines @@
 
   // ScrollDelegate overrides:
   virtual bool OnScroll(float dx, float dy) OVERRIDE;
 
   // ContextMenuController overrides:
   virtual void ShowContextMenuForView(View* source,
                                       const gfx::Point& point,
                                       ui::MenuSourceType source_type) OVERRIDE;
 
   // Menu::Delegate overrides:
-  virtual string16 GetLabel(int id) const OVERRIDE;
+  virtual base::string16 GetLabel(int id) const OVERRIDE;
   virtual bool IsCommandEnabled(int id) const OVERRIDE;
   virtual void ExecuteCommand(int id) OVERRIDE;
 
  protected:
   // View overrides:
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE = 0;
 
   BaseScrollBarThumb* GetThumb() const;
   CustomButton::ButtonState GetThumbTrackState() const;
 
@@ skipping 70 matching lines @@
 
   scoped_ptr<MenuRunner> menu_runner_;
   scoped_ptr<ScrollAnimator> scroll_animator_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseScrollBar);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_H_