Move ObserverList to base namespace.

ui/compositor/layer_animation_sequence.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/compositor/layer_animation_sequence.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/trace_event/trace_event.h"
@@ skipping 210 matching lines @@
   DCHECK(element_properties & event_property);
   elements_[current_index]->set_effective_start_time(event.monotonic_time);
 }
 
 void LayerAnimationSequence::OnScheduled() {
   NotifyScheduled();
 }
 
 void LayerAnimationSequence::OnAnimatorDestroyed() {
   if (observers_.might_have_observers()) {
-    ObserverListBase<LayerAnimationObserver>::Iterator it(&observers_);
+    base::ObserverListBase<LayerAnimationObserver>::Iterator it(&observers_);
     LayerAnimationObserver* obs;
     while ((obs = it.GetNext()) != NULL) {
       if (!obs->RequiresNotificationWhenAnimatorDestroyed()) {
         // Remove the observer, but do not allow notifications to be sent.
         observers_.RemoveObserver(obs);
         obs->DetachedFromSequence(this, false);
       }
     }
   }
 }
@@ skipping 30 matching lines @@
 
 LayerAnimationElement* LayerAnimationSequence::CurrentElement() const {
   if (elements_.empty())
     return NULL;
 
   size_t current_index = last_element_ % elements_.size();
   return elements_[current_index].get();
 }
 
 }  // namespace ui