ash: Use stl utilities from the base namespace

ash/display/display_animator_chromeos.cc

 // Copyright 2014 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 "ash/display/display_animator_chromeos.h"
 
 #include "ash/common/shell_window_ids.h"
 #include "ash/shell.h"
 #include "base/bind.h"
 #include "base/stl_util.h"
@@ skipping 188 matching lines @@
     ui::MultipleDisplayState failed_new_state) {
   if (!hiding_layers_.empty())
     StartFadeInAnimation();
 }
 
 void DisplayAnimatorChromeOS::ClearHidingLayers() {
   if (timer_) {
     timer_->Stop();
     timer_.reset();
   }
-  STLDeleteContainerPairSecondPointers(hiding_layers_.begin(),
-                                       hiding_layers_.end());
+  base::STLDeleteContainerPairSecondPointers(hiding_layers_.begin(),
+                                             hiding_layers_.end());
   hiding_layers_.clear();
 }
 
 }  // namespace ash