Allow IO thread usage in WebRTC browsertests

chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc

 // Copyright 2013 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 <stddef.h>
 
 #include <ctime>
 
 #include "base/command_line.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/process/launch.h"
 #include "base/process/process.h"
 #include "base/scoped_native_library.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 #include "chrome/browser/media/webrtc/webrtc_browsertest_audio.h"
 #include "chrome/browser/media/webrtc/webrtc_browsertest_base.h"
 #include "chrome/browser/media/webrtc/webrtc_browsertest_common.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 643 matching lines @@
   ASSERT_NO_FATAL_FAILURE(SetupAndRecordAudioCall(
       reference_file, recording, constraints,
       base::TimeDelta::FromSeconds(30)));
 
   ComputeAndPrintPesqResults(reference_file, recording, perf_modifier);
   DeleteFileUnlessTestFailed(recording, false);
 }
 
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioQualityBrowserTest,
                        MANUAL_TestCallQualityWithAudioFromFakeDevice) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   TestWithFakeDeviceGetUserMedia(kAudioOnlyCallConstraints, "_getusermedia");
 }
 
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioQualityBrowserTest,
                        MANUAL_TestCallQualityWithAudioFromWebAudio) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   if (OnWin8()) {
     // http://crbug.com/379798.
     LOG(ERROR) << "This test is not implemented for Windows XP/Win8.";
     return;
   }
   ASSERT_TRUE(test::HasReferenceFilesInCheckout());
   ASSERT_TRUE(embedded_test_server()->Start());
 
   ASSERT_TRUE(ForceMicrophoneVolumeTo100Percent());
 
@@ skipping 95 matching lines @@
   AnalyzeSegmentsAndPrintResult(
       ref_segments, actual_segments, reference_file, perf_modifier);
 
   DeleteFileUnlessTestFailed(recording, false);
   DeleteFileUnlessTestFailed(actual_files_dir, true);
 }
 
 // The AGC should apply non-zero gain here.
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioQualityBrowserTest,
                        MANUAL_TestAutoGainControlOnLowAudio) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   ASSERT_NO_FATAL_FAILURE(TestAutoGainControl(
       kReferenceFile, kAudioOnlyCallConstraints, "_with_agc"));
 }
 
 // Since the AGC is off here there should be no gain at all.
 IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcAudioQualityBrowserTest,
                        MANUAL_TestAutoGainIsOffWithAudioProcessingOff) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   const char* kAudioCallWithoutAudioProcessing =
       "{audio: { mandatory: { echoCancellation: false } } }";
   ASSERT_NO_FATAL_FAILURE(TestAutoGainControl(
       kReferenceFile, kAudioCallWithoutAudioProcessing, "_no_agc"));
 }