Prefix string16 with base:: in ui/.

ui/base/cursor/cursor_loader_win.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_BASE_CURSOR_CURSOR_LOADER_WIN_H_
 #define UI_BASE_CURSOR_CURSOR_LOADER_WIN_H_
 
 #include "base/compiler_specific.h"
 #include "ui/base/cursor/cursor_loader.h"
 
@@ skipping 11 matching lines @@
   virtual void LoadAnimatedCursor(int id,
                                   int resource_id,
                                   const gfx::Point& hot,
                                   int frame_delay_ms) OVERRIDE;
   virtual void UnloadAll() OVERRIDE;
   virtual void SetPlatformCursor(gfx::NativeCursor* cursor) OVERRIDE;
 
 #if defined(USE_AURA)
   // Used to pass the cursor resource module name to the cursor loader. This is
   // typically used to load non system cursors.
-  static void SetCursorResourceModule(const string16& module_name);
+  static void SetCursorResourceModule(const base::string16& module_name);
 #endif
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CursorLoaderWin);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CURSOR_CURSOR_LOADER_WIN_H_