Disable AudioDeviceTest.StartStopRecording on iOS

webrtc/modules/audio_device/ios/audio_device_unittest_ios.mm

 /*
  *  Copyright (c) 2015 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 584 matching lines @@
 // Failing when running on real iOS devices: bugs.webrtc.org/6889.
 TEST_F(AudioDeviceTest, DISABLED_StartStopPlayout) {
   StartPlayout();
   StopPlayout();
   StartPlayout();
   StopPlayout();
 }
 
 // Tests that recording can be initiated, started and stopped. No audio callback
 // is registered in this test.
-TEST_F(AudioDeviceTest, StartStopRecording) {
+// Can sometimes fail when running on real devices: bugs.webrtc.org/7888.
+TEST_F(AudioDeviceTest, DISABLED_StartStopRecording) {
+  StartRecording();
+  StopRecording();
   StartRecording();
   StopRecording();
 }
 
 // Verify that calling StopPlayout() will leave us in an uninitialized state
 // which will require a new call to InitPlayout(). This test does not call
 // StartPlayout() while being uninitialized since doing so will hit a
 // RTC_DCHECK.
 TEST_F(AudioDeviceTest, StopPlayoutRequiresInitToRestart) {
   EXPECT_EQ(0, audio_device()->InitPlayout());
@@ skipping 252 matching lines @@
   // Wait for notification to propagate.
   rtc::MessageQueueManager::ProcessAllMessageQueues();
   EXPECT_TRUE(audio_device->is_interrupted_);
 
   audio_device->Init();
   audio_device->InitPlayout();
   EXPECT_FALSE(audio_device->is_interrupted_);
 }
 
 }  // namespace webrtc