Prefix string16 with base:: in ui/.

ui/views/widget/desktop_aura/desktop_root_window_host.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_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/ui_base_types.h"
@@ skipping 95 matching lines @@
   virtual void Restore() = 0;
   virtual bool IsMaximized() const = 0;
   virtual bool IsMinimized() const = 0;
 
   virtual bool HasCapture() const = 0;
 
   virtual void SetAlwaysOnTop(bool always_on_top) = 0;
   virtual bool IsAlwaysOnTop() const = 0;
 
   // Returns true if the title changed.
-  virtual bool SetWindowTitle(const string16& title) = 0;
+  virtual bool SetWindowTitle(const base::string16& title) = 0;
 
   virtual void ClearNativeFocus() = 0;
 
   virtual Widget::MoveLoopResult RunMoveLoop(
       const gfx::Vector2d& drag_offset,
       Widget::MoveLoopSource source,
       Widget::MoveLoopEscapeBehavior escape_behavior) = 0;
   virtual void EndMoveLoop() = 0;
 
   virtual void SetVisibilityChangedAnimationsEnabled(bool value) = 0;
@@ skipping 22 matching lines @@
   virtual void OnNativeWidgetBlur() = 0;
 
   // Returns true if the Widget was closed but is still showing because of
   // animations.
   virtual bool IsAnimatingClosed() const = 0;
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_ROOT_WINDOW_HOST_H_