Replace more ObserverList with base::ObserverList.

sync/engine/directory_commit_contribution_unittest.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 "sync/engine/directory_commit_contribution.h"
 
 #include "base/message_loop/message_loop.h"
 #include "sync/internal_api/public/base/attachment_id_proto.h"
 #include "sync/sessions/status_controller.h"
 #include "sync/syncable/entry.h"
@@ skipping 87 matching lines @@
       response->set_id_string(entity.id_string());
   }
 
   syncable::Directory* dir() {
     return dir_maker_.directory();
   }
 
   TestIdFactory id_factory_;
 
   // Used in construction of DirectoryTypeDebugInfoEmitters.
-  ObserverList<TypeDebugInfoObserver> type_observers_;
+  base::ObserverList<TypeDebugInfoObserver> type_observers_;
 
  private:
   base::MessageLoop loop_;  // Neeed to initialize the directory.
   TestDirectorySetterUpper dir_maker_;
 };
 
 // Verify that the DirectoryCommitContribution contains only entries of its
 // specified type.
 TEST_F(DirectoryCommitContributionTest, GatherByTypes) {
   int64 pref1;
@@ skipping 383 matching lines @@
     EXPECT_FALSE(a3.GetId().ServerKnows());
     EXPECT_FALSE(a3.GetSyncing());
     EXPECT_FALSE(a3.GetDirtySync());
     EXPECT_EQ(0, a3.GetServerVersion());
   }
 
   art_cc->CleanUp();
 }
 
 }  // namespace syncer