Replace more ObserverList with base::ObserverList.

components/view_manager/public/cpp/lib/view_private.h

 // 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.
 
 #ifndef COMPONENTS_VIEW_MANAGER_PUBLIC_CPP_LIB_VIEW_PRIVATE_H_
 #define COMPONENTS_VIEW_MANAGER_PUBLIC_CPP_LIB_VIEW_PRIVATE_H_
 
 #include "components/view_manager/public/cpp/view.h"
 
 namespace mojo {
 
 // This class is a friend of a View and contains functions to mutate internal
 // state of View.
 class ViewPrivate {
  public:
   explicit ViewPrivate(View* view);
   ~ViewPrivate();
 
   // Creates and returns a new View. Caller owns the return value.
   static View* LocalCreate();
 
-  ObserverList<ViewObserver>* observers() { return &view_->observers_; }
+  base::ObserverList<ViewObserver>* observers() { return &view_->observers_; }
 
   void ClearParent() { view_->parent_ = NULL; }
 
   void set_visible(bool visible) { view_->visible_ = visible; }
 
   void set_drawn(bool drawn) { view_->drawn_ = drawn; }
 
   void set_id(Id id) { view_->id_ = id; }
 
   void set_view_manager(ViewManager* manager) {
@@ skipping 30 matching lines @@
 
  private:
   View* view_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ViewPrivate);
 };
 
 }  // namespace mojo
 
 #endif  // COMPONENTS_VIEW_MANAGER_PUBLIC_CPP_LIB_VIEW_PRIVATE_H_