Replace more ObserverList with base::ObserverList.

components/view_manager/server_view.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 "components/view_manager/server_view.h"
 
 #include <inttypes.h>
 
 #include "base/strings/stringprintf.h"
 #include "components/view_manager/server_view_delegate.h"
 #include "components/view_manager/server_view_observer.h"
 
 namespace view_manager {
 
 ServerView::ServerView(ServerViewDelegate* delegate, const ViewId& id)
     : delegate_(delegate),
       id_(id),
       parent_(nullptr),
       visible_(false),
       opacity_(1),
       // Don't notify newly added observers during notification. This causes
       // problems for code that adds an observer as part of an observer
       // notification (such as ServerViewDrawTracker).
-      observers_(ObserverList<ServerViewObserver>::NOTIFY_EXISTING_ONLY) {
+      observers_(base::ObserverList<ServerViewObserver>::NOTIFY_EXISTING_ONLY) {
   DCHECK(delegate);  // Must provide a delegate.
 }
 
 ServerView::~ServerView() {
   delegate_->PrepareToDestroyView(this);
   FOR_EACH_OBSERVER(ServerViewObserver, observers_, OnWillDestroyView(this));
 
   while (!children_.empty())
     children_.front()->parent()->Remove(children_.front());
 
@@ skipping 190 matching lines @@
     child->BuildDebugInfo(depth + "  ", result);
 }
 #endif
 
 void ServerView::RemoveImpl(ServerView* view) {
   view->parent_ = NULL;
   children_.erase(std::find(children_.begin(), children_.end(), view));
 }
 
 }  // namespace view_manager