Prefix string16 with base:: in ui/.

ui/views/widget/desktop_aura/desktop_native_widget_aura.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/desktop_aura/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 569 matching lines @@
     desktop_root_window_host_->CenterWindow(size);
 }
 
 void DesktopNativeWidgetAura::GetWindowPlacement(
       gfx::Rect* bounds,
       ui::WindowShowState* maximized) const {
   if (content_window_)
     desktop_root_window_host_->GetWindowPlacement(bounds, maximized);
 }
 
-bool DesktopNativeWidgetAura::SetWindowTitle(const string16& title) {
+bool DesktopNativeWidgetAura::SetWindowTitle(const base::string16& title) {
   if (!content_window_)
     return false;
   return desktop_root_window_host_->SetWindowTitle(title);
 }
 
 void DesktopNativeWidgetAura::SetWindowIcons(const gfx::ImageSkia& window_icon,
                                              const gfx::ImageSkia& app_icon) {
   if (content_window_)
     desktop_root_window_host_->SetWindowIcons(window_icon, app_icon);
 }
@@ skipping 515 matching lines @@
   input_method_event_filter_->SetInputMethodPropertyInRootWindow(
       root_window_->window());
   root_window_event_filter_->AddHandler(input_method_event_filter_.get());
 }
 
 void DesktopNativeWidgetAura::UpdateWindowTransparency() {
   content_window_->SetTransparent(ShouldUseNativeFrame());
 }
 
 }  // namespace views