Prefix string16 with base:: in ui/.

ui/views/view.cc

 // 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.
 
 #define _USE_MATH_DEFINES // For VC++ to get M_PI. This has to be first.
 
 #include "ui/views/view.h"
 
 #include <algorithm>
 #include <cmath>
@@ skipping 1234 matching lines @@
 FocusTraversable* View::GetFocusTraversable() {
   return NULL;
 }
 
 FocusTraversable* View::GetPaneFocusTraversable() {
   return NULL;
 }
 
 // Tooltips --------------------------------------------------------------------
 
-bool View::GetTooltipText(const gfx::Point& p, string16* tooltip) const {
+bool View::GetTooltipText(const gfx::Point& p, base::string16* tooltip) const {
   return false;
 }
 
 bool View::GetTooltipTextOrigin(const gfx::Point& p, gfx::Point* loc) const {
   return false;
 }
 
 // Context menus ---------------------------------------------------------------
 
 void View::ShowContextMenu(const gfx::Point& p,
@@ skipping 1129 matching lines @@
   // Message the RootView to do the drag and drop. That way if we're removed
   // the RootView can detect it and avoid calling us back.
   gfx::Point widget_location(event.location());
   ConvertPointToWidget(this, &widget_location);
   widget->RunShellDrag(this, data, widget_location, drag_operations, source);
   // WARNING: we may have been deleted.
   return true;
 }
 
 }  // namespace views