Fix integration tests in src/chrome and src/extensions so that we can turn on IO thread checks wi...

chrome/browser/extensions/api/cast_streaming/cast_streaming_apitest.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 <stdint.h>
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 #include <vector>
 
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
+#include "base/threading/thread_restrictions.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/common/content_switches.h"
 #include "extensions/common/switches.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/base/video_frame.h"
 #include "media/cast/cast_config.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/test/utility/audio_utility.h"
 #include "media/cast/test/utility/default_config.h"
@@ skipping 352 matching lines @@
   receiver->AddExpectedTone(500 /* Hz */);
   receiver->AddExpectedTone(1800 /* Hz */);
   receiver->AddExpectedColor(YUVColor(82, 90, 240));  // rgb(255, 0, 0)
   receiver->AddExpectedColor(YUVColor(145, 54, 34));  // rgb(0, 255, 0)
   receiver->AddExpectedColor(YUVColor(41, 240, 110));  // rgb(0, 0, 255)
   receiver->Start();
   receiver->WaitForExpectedTonesAndColors();
   receiver->Stop();
 
   delete receiver;
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   cast_environment->Shutdown();
 }
 
 IN_PROC_BROWSER_TEST_F(CastStreamingApiTestWithPixelOutput, RtpStreamError) {
   ASSERT_TRUE(RunExtensionSubtest("cast_streaming", "rtp_stream_error.html"));
 }
 
 }  // namespace extensions