Prefix string16 with base:: in ui/.

ui/views/controls/slider.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_SLIDER_H_
 #define UI_VIEWS_CONTROLS_SLIDER_H_
 
 #include "ui/gfx/animation/animation_delegate.h"
 #include "ui/views/view.h"
 #include "ui/views/views_export.h"
@@ skipping 39 matching lines @@
 
   Slider(SliderListener* listener, Orientation orientation);
   virtual ~Slider();
 
   float value() const { return value_; }
   void SetValue(float value);
 
   // Set the delta used for changing the value via keyboard.
   void SetKeyboardIncrement(float increment);
 
-  void SetAccessibleName(const string16& name);
+  void SetAccessibleName(const base::string16& name);
 
   void set_enable_accessibility_events(bool enabled) {
     accessibility_events_enabled_ = enabled;
   }
 
   void set_focus_border_color(SkColor color) { focus_border_color_ = color; }
 
   // Update UI based on control on/off state.
   void UpdateState(bool control_on);
 
@@ skipping 27 matching lines @@
 
   SliderListener* listener_;
   Orientation orientation_;
 
   scoped_ptr<gfx::SlideAnimation> move_animation_;
 
   float value_;
   float keyboard_increment_;
   float animating_value_;
   bool value_is_valid_;
-  string16 accessible_name_;
+  base::string16 accessible_name_;
   bool accessibility_events_enabled_;
   SkColor focus_border_color_;
 
   // Relative position of the mouse cursor (or the touch point) on the slider's
   // button.
   gfx::Point initial_button_offset_;
 
   const int* bar_active_images_;
   const int* bar_disabled_images_;
   const gfx::ImageSkia* thumb_;
   const gfx::ImageSkia* images_[4];
   int bar_height_;
 
   DISALLOW_COPY_AND_ASSIGN(Slider);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_SLIDER_H_