Actually pass the stereo=1 parameter to WebRTC for receiving audio

remoting/protocol/connection_unittest.cc

 // Copyright 2015 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.
 
 #define _USE_MATH_DEFINES // For VC++ to get M_PI. This has to be first.
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/macros.h"
@@ skipping 605 matching lines @@
                 stats.host_stats.capture_overhead_delay +
                 stats.host_stats.encode_delay +
                 stats.host_stats.send_pending_delay,
             stats.client_stats.time_received);
   EXPECT_LE(stats.client_stats.time_received, stats.client_stats.time_decoded);
   EXPECT_LE(stats.client_stats.time_decoded, stats.client_stats.time_rendered);
   EXPECT_LE(stats.client_stats.time_rendered, finish_time);
 }
 
 // Disabling due to failures after WebRTC roll http://crbug.com/685910
-TEST_P(ConnectionTest, DISABLED_Audio) {
+TEST_P(ConnectionTest, Audio) {
   Connect();
 
   std::unique_ptr<AudioStream> audio_stream =
       host_connection_->StartAudioStream(base::MakeUnique<TestAudioSource>());
 
   // Wait for 1 second worth of audio samples.
   client_audio_player_.WaitForSamples(kAudioSampleRate * 2);
   client_audio_player_.Verify();
 }
 
@@ skipping 36 matching lines @@
   auto capturer = base::MakeUnique<TestScreenCapturer>();
   capturer->FailNthFrame(1);
   auto video_stream = host_connection_->StartVideoStream(std::move(capturer));
 
   WaitNextVideoFrame();
   WaitNextVideoFrame();
 }
 
 }  // namespace protocol
 }  // namespace remoting