sync: Use base::MessageLoop.

sync/notifier/ack_tracker_unittest.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 "sync/notifier/ack_tracker.h"
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/time/tick_clock.h"
@@ skipping 91 matching lines @@
 
   FakeTickClock fake_tick_clock_;
   ::testing::StrictMock<MockDelegate> delegate_;
   AckTracker ack_tracker_;
 
   const invalidation::ObjectId kIdOne;
   const invalidation::ObjectId kIdTwo;
 
   // AckTracker uses base::Timer internally, which depends on the existence of a
   // MessageLoop.
-  MessageLoop message_loop_;
+  base::MessageLoop message_loop_;
 };
 
 // Tests that various combinations of Track()/Ack() behave as
 // expected.
 TEST_F(AckTrackerTest, TrackAndAck) {
   ObjectIdSet ids_one;
   ids_one.insert(kIdOne);
   ObjectIdSet ids_two;
   ids_two.insert(kIdTwo);
   ObjectIdSet ids_all;
@@ skipping 220 matching lines @@
   EXPECT_EQ(base::TimeDelta::FromSeconds(120), GetTimerDelay());
   fake_tick_clock_.LeapForward(120);
   EXPECT_CALL(delegate_, OnTimeout(ids));
   EXPECT_TRUE(TriggerTimeoutNow());
 
   ack_tracker_.Ack(ids);
   EXPECT_TRUE(ack_tracker_.IsQueueEmptyForTest());
 }
 
 }  // namespace syncer