Fix memory leak in tests.

media/cast/video_sender/video_sender_unittest.cc

 // Copyright 2013 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 <vector>
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "media/base/video_frame.h"
@@ skipping 111 matching lines @@
   EXPECT_CALL(mock_transport_, SendPackets(_)).Times(1);
   InitEncoder(true);
   task_runner_->RunTasks();
 
   scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame();
 
   base::TimeTicks capture_time;
   video_sender_->InsertRawVideoFrame(video_frame, capture_time);
 
   task_runner_->RunTasks();
+
+  // We need to run the task to cleanup the GPU instance.
+  video_sender_.reset(NULL);
+  task_runner_->RunTasks();
 }
 
 TEST_F(VideoSenderTest, RtcpTimer) {
   EXPECT_CALL(mock_transport_, SendPackets(_)).Times(AtLeast(1));
   EXPECT_CALL(mock_transport_, SendRtcpPacket(_)).Times(1);
   InitEncoder(false);
 
   scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame();
 
   base::TimeTicks capture_time;
@@ skipping 36 matching lines @@
       base::TimeDelta::FromMilliseconds(1 + kDefaultRtpMaxDelayMs);
 
   // Make sure that we do a re-send.
   testing_clock_.Advance(max_resend_timeout);
   task_runner_->RunTasks();
 }
 
 }  // namespace cast
 }  // namespace media