Prefix string16 with base:: in ui/.

ui/views/examples/tabbed_pane_example.cc

 // Copyright (c) 2011 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/examples/tabbed_pane_example.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/tabbed_pane/tabbed_pane.h"
 #include "ui/views/layout/grid_layout.h"
@@ skipping 39 matching lines @@
   layout->StartRow(0 /* no expand */, button_column);
   layout->AddView(add_);
   layout->AddView(add_at_);
   layout->AddView(select_at_);
 }
 
 void TabbedPaneExample::ButtonPressed(Button* sender, const ui::Event& event) {
   if (sender == add_) {
     AddButton("Added");
   } else if (sender == add_at_) {
-    const string16 label = ASCIIToUTF16("Added at 1");
+    const base::string16 label = ASCIIToUTF16("Added at 1");
     tabbed_pane_->AddTabAtIndex(1, label, new LabelButton(NULL, label));
   } else if (sender == select_at_) {
     if (tabbed_pane_->GetTabCount() > 1)
       tabbed_pane_->SelectTabAt(1);
   }
   PrintStatus();
 }
 
 void TabbedPaneExample::TabSelectedAt(int index) {
   // Just print the status when selection changes.
   PrintStatus();
 }
 
 void TabbedPaneExample::PrintStatus() {
   ExampleBase::PrintStatus("Tab Count:%d, Selected Tab:%d",
                            tabbed_pane_->GetTabCount(),
                            tabbed_pane_->selected_tab_index());
 }
 
 void TabbedPaneExample::AddButton(const std::string& label) {
   LabelButton* button = new LabelButton(NULL, ASCIIToUTF16(label));
   tabbed_pane_->AddTab(ASCIIToUTF16(label), button);
 }
 
 }  // namespace examples
 }  // namespace views