Disable flaky WebRtcAudioBrowserTest.CanMakeVideoCallAndThenRenegotiateToAudio on Linux.

content/browser/webrtc/webrtc_audio_browsertest.cc

 // Copyright (c) 2016 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 "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/threading/platform_thread.h"
 #include "build/build_config.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/browser/webrtc/webrtc_content_browsertest_base.h"
@@ skipping 43 matching lines @@
 
     ASSERT_TRUE(base::CommandLine::ForCurrentProcess()->HasSwitch(
         switches::kUseFakeDeviceForMediaStream))
             << "Must run with fake devices since the test will explicitly look "
             << "for the fake device signal.";
 
     MakeTypicalCall(javascript, "/media/peerconnection-call-audio.html");
   }
 };
 
+// Flaky on Linux. http://crbug.com/733551
+#if defined(OS_LINUX)
+#define MAYBE_CanMakeVideoCallAndThenRenegotiateToAudio \
+  DISABLED_CanMakeVideoCallAndThenRenegotiateToAudio
+#else
+#define MAYBE_CanMakeVideoCallAndThenRenegotiateToAudio \
+  CanMakeVideoCallAndThenRenegotiateToAudio
+#endif
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioBrowserTest,
-                       CanMakeVideoCallAndThenRenegotiateToAudio) {
+                       MAYBE_CanMakeVideoCallAndThenRenegotiateToAudio) {
   MakeAudioDetectingPeerConnectionCall(
       "callAndRenegotiateToAudio({audio: true, video:true}, {audio: true});");
 }
 
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioBrowserTest,
                        EstablishAudioVideoCallAndEnsureAudioIsPlaying) {
   MakeAudioDetectingPeerConnectionCall(
       "callAndEnsureAudioIsPlaying({audio:true, video:true});");
 }
 
@@ skipping 33 matching lines @@
       "callAndEnsureRemoteVideoMutingDoesntMuteAudio();");
 }
 
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioBrowserTest,
                        EstablishAudioVideoCallAndVerifyUnmutingWorks) {
   MakeAudioDetectingPeerConnectionCall(
       "callAndEnsureAudioTrackUnmutingWorks();");
 }
 
 }  // namespace content