Allow IO thread usage in WebRTC browsertests

chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc

Index: chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc
diff --git a/chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc b/chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc
index 8107494b852a4fe7df29dbdfdbec0877ab1eee6a..be636d08b7183c1d528685ce7ec31e681d4de324 100644
--- a/chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc
+++ b/chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc
@@ -36,6 +36,10 @@
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "testing/perf/perf_test.h"
 
+#if defined(OS_MACOSX)
+#include "base/threading/thread_restrictions.h"
+#endif  // defined(OS_MACOSX)
+
 namespace {
 
 static const base::FilePath::CharType kReferenceFile[] =
@@ -681,11 +685,19 @@ void MAYBE_WebRtcAudioQualityBrowserTest::TestWithFakeDeviceGetUserMedia(
 
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioQualityBrowserTest,
                        MANUAL_TestCallQualityWithAudioFromFakeDevice) {
+// crbug.com/684680
+#if defined(OS_MACOSX)
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+#endif  // defined(OS_MACOSX)
   TestWithFakeDeviceGetUserMedia(kAudioOnlyCallConstraints, "_getusermedia");
 }
 
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioQualityBrowserTest,
                        MANUAL_TestCallQualityWithAudioFromWebAudio) {
+// crbug.com/684680
+#if defined(OS_MACOSX)
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+#endif  // defined(OS_MACOSX)
   if (OnWin8()) {
     // http://crbug.com/379798.
     LOG(ERROR) << "This test is not implemented for Windows XP/Win8.";
@@ -801,6 +813,10 @@ void MAYBE_WebRtcAudioQualityBrowserTest::TestAutoGainControl(
 // The AGC should apply non-zero gain here.
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioQualityBrowserTest,
                        MANUAL_TestAutoGainControlOnLowAudio) {
+// crbug.com/684680
+#if defined(OS_MACOSX)
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+#endif  // defined(OS_MACOSX)
   ASSERT_NO_FATAL_FAILURE(TestAutoGainControl(
       kReferenceFile, kAudioOnlyCallConstraints, "_with_agc"));
 }
@@ -808,6 +824,10 @@ IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioQualityBrowserTest,
 // Since the AGC is off here there should be no gain at all.
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioQualityBrowserTest,
                        MANUAL_TestAutoGainIsOffWithAudioProcessingOff) {
+// crbug.com/684680
+#if defined(OS_MACOSX)
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+#endif  // defined(OS_MACOSX)
   const char* kAudioCallWithoutAudioProcessing =
       "{audio: { mandatory: { echoCancellation: false } } }";
   ASSERT_NO_FATAL_FAILURE(TestAutoGainControl(