Replace more ObserverList with base::ObserverList.

remoting/test/test_chromoting_client.h

Index: remoting/test/test_chromoting_client.h
diff --git a/remoting/test/test_chromoting_client.h b/remoting/test/test_chromoting_client.h
index 69f39670c490126acd1f43828b9956e99f774709..823fe1a7edc57c4e7f2fd6c4435341b5de9a89c5 100644
--- a/remoting/test/test_chromoting_client.h
+++ b/remoting/test/test_chromoting_client.h
@@ -99,7 +99,7 @@ class TestChromotingClient : public ClientUserInterface,
   // List of observers which are notified when remote connection events occur.
   // We specify true below for the 'check_empty' flag so the list will check to
   // see if all observers have been unregistered when it is destroyed.
-  ObserverList<RemoteConnectionObserver, true> connection_observers_;
+  base::ObserverList<RemoteConnectionObserver, true> connection_observers_;
 
   // ConnectionToHost used by TestChromotingClient tests.
   scoped_ptr<protocol::ConnectionToHost> test_connection_to_host_;