Allow IO thread usage in WebRTC browsertests

chrome/browser/media/webrtc/webrtc_apprtc_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 "base/command_line.h"
 #include "base/files/file_enumerator.h"
 #include "base/path_service.h"
 #include "base/process/launch.h"
 #include "base/rand_util.h"
+#include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/infobars/infobar_responder.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/media/webrtc/webrtc_browsertest_base.h"
 #include "chrome/browser/media/webrtc/webrtc_browsertest_common.h"
 #include "chrome/browser/permissions/permission_request_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
@@ skipping 205 matching lines @@
     return firefox_.IsValid();
   }
 
  private:
   base::Process dev_appserver_;
   base::Process firefox_;
   base::Process collider_server_;
 };
 
 IN_PROC_BROWSER_TEST_F(WebRtcApprtcBrowserTest, MANUAL_WorksOnApprtc) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   DetectErrorsInJavaScript();
   ASSERT_TRUE(LaunchApprtcInstanceOnLocalhost("9999"));
   ASSERT_TRUE(LaunchColliderOnLocalHost("http://localhost:9999", "8089"));
   while (!LocalApprtcInstanceIsUp())
     DVLOG(1) << "Waiting for AppRTC to come up...";
 
   GURL room_url = GURL("http://localhost:9999/r/some_room"
                        "?wshpp=localhost:8089&wstls=false");
 
   // Set up the left tab.
@@ skipping 53 matching lines @@
       InfoBarService::FromWebContents(chrome_tab), InfoBarResponder::ACCEPT);
   ui_test_utils::NavigateToURL(browser(), room_url);
 
   ASSERT_TRUE(LaunchFirefoxWithUrl(room_url));
 
   ASSERT_TRUE(WaitForCallToComeUp(chrome_tab));
 
   // Ensure Firefox manages to send video our way.
   ASSERT_TRUE(DetectRemoteVideoPlaying(chrome_tab));
 }