Disable flaky tests on iOS

webrtc/pc/currentspeakermonitor_unittest.cc

 /*
  *  Copyright 2004 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 104 matching lines @@
 
   info.active_streams.push_back(std::make_pair(kSsrc1, 9));
   info.active_streams.push_back(std::make_pair(kSsrc2, 1));
   SignalAudioMonitor(info);
 
   // We expect no speaker change because of the rapid change.
   EXPECT_EQ(current_speaker_, kSsrc2);
   EXPECT_EQ(num_changes_, 1);
 }
 
-TEST_F(CurrentSpeakerMonitorTest, SpeakerChange) {
+// Flaky on iOS: webrtc:7057.
+#if defined(WEBRTC_IOS)
+#define MAYBE_SpeakerChange DISABLED_SpeakerChange
+#else
+#define MAYBE_SpeakerChange SpeakerChange
+#endif
+TEST_F(CurrentSpeakerMonitorTest, MAYBE_SpeakerChange) {
   AudioInfo info;
   InitAudioInfo(&info, 0, 0);
 
   info.active_streams.push_back(std::make_pair(kSsrc1, 3));
   info.active_streams.push_back(std::make_pair(kSsrc2, 7));
   SignalAudioMonitor(info);
 
   EXPECT_EQ(current_speaker_, 0U);
   EXPECT_EQ(num_changes_, 0);
 
@@ skipping 64 matching lines @@
   info.active_streams.push_back(std::make_pair(kSsrc1, 3));
   info.active_streams.push_back(std::make_pair(kSsrc2, 0));
   SignalAudioMonitor(info);
 
   // At this point, we should have concluded that SSRC2 stopped speaking.
   EXPECT_EQ(current_speaker_, kSsrc1);
   EXPECT_EQ(num_changes_, 2);
 }
 
 }  // namespace cricket