Prefix string16 with base:: in ui/.

ui/views/widget/tooltip_manager_win.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.
 
 #include "ui/views/widget/tooltip_manager_win.h"
 
 #include <windowsx.h>
 
 #include <limits>
 #include <vector>
@@ skipping 297 matching lines @@
   if (view != last_tooltip_view_) {
     // NOTE: This *must* be sent regardless of the visibility of the tooltip.
     // It triggers Windows to ask for the tooltip again.
     SendMessage(tooltip_hwnd_, TTM_POP, 0, 0);
     last_tooltip_view_ = view;
   } else if (last_tooltip_view_ != NULL) {
     // Tooltip is showing, and mouse is over the same view. See if the tooltip
     // text has changed.
     gfx::Point view_point = mouse_pos;
     View::ConvertPointToTarget(root_view, last_tooltip_view_, &view_point);
-    string16 new_tooltip_text;
+    base::string16 new_tooltip_text;
     bool has_tooltip_text =
         last_tooltip_view_->GetTooltipText(view_point, &new_tooltip_text);
     if (!has_tooltip_text || (new_tooltip_text != tooltip_text_)) {
       // The text has changed, hide the popup.
       SendMessage(tooltip_hwnd_, TTM_POP, 0, 0);
       if (has_tooltip_text && !new_tooltip_text.empty() && tooltip_showing_) {
         // New text is valid, show the popup.
         SendMessage(tooltip_hwnd_, TTM_POPUP, 0, 0);
       }
     }
@@ skipping 19 matching lines @@
   // Forward the message onto the tooltip.
   MSG msg;
   msg.hwnd = GetParent();
   msg.message = u_msg;
   msg.wParam = w_param;
   msg.lParam = l_param;
   SendMessage(tooltip_hwnd_, TTM_RELAYEVENT, 0, (LPARAM)&msg);
 }
 
 }  // namespace views