Prefix string16 with base:: in ui/.

ui/views/bubble/tray_bubble_view.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_BUBBLE_TRAY_BUBBLE_VIEW_H_
 #define UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/mouse_watcher.h"
@@ skipping 53 matching lines @@
     virtual void BubbleViewDestroyed() = 0;
 
     // Called when the mouse enters/exits the view.
     // Note: This event will only be called if the mouse gets actively moved by
     // the user to enter the view.
     virtual void OnMouseEnteredView() = 0;
     virtual void OnMouseExitedView() = 0;
 
     // Called from GetAccessibleState(); should return the appropriate
     // accessible name for the bubble.
-    virtual string16 GetAccessibleNameForBubble() = 0;
+    virtual base::string16 GetAccessibleNameForBubble() = 0;
 
     // Passes responsibility for BubbleDelegateView::GetAnchorRect to the
     // delegate.
     virtual gfx::Rect GetAnchorRect(views::Widget* anchor_widget,
                                     AnchorType anchor_type,
                                     AnchorAlignment anchor_alignment) = 0;
 
     // Called when a bubble wants to hide/destroy itself (e.g. last visible
     // child view was closed).
     virtual void HideBubble(const TrayBubbleView* bubble_view) = 0;
@@ skipping 109 matching lines @@
 
   // Used to find any mouse movements.
   scoped_ptr<MouseWatcher> mouse_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayBubbleView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_