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

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

 // Copyright (c) 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 "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/threading/thread_restrictions.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/file_manager/file_manager_browsertest_base.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chromeos/chromeos_switches.h"
 #include "components/session_manager/core/session_manager.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/user_manager/user_manager.h"
 
 namespace file_manager {
@@ skipping 605 matching lines @@
     Profile* const profile = chromeos::ProfileHelper::GetProfileByUserIdHash(
         kTestAccounts[PRIMARY_ACCOUNT_INDEX].hash);
     return profile ? profile : FileManagerBrowserTestBase::profile();
   }
 
   // Sets the test case name (used as a function name in test_cases.js to call.)
   void set_test_case_name(const std::string& name) { test_case_name_ = name; }
 
   // Adds a new user for testing to the current session.
   void AddUser(const TestAccountInfo& info, bool log_in) {
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
     const AccountId account_id(AccountId::FromUserEmail(info.email));
     if (log_in) {
       session_manager::SessionManager::Get()->CreateSession(account_id,
                                                             info.hash);
     }
     user_manager::UserManager::Get()->SaveUserDisplayName(
         account_id, base::UTF8ToUTF16(info.display_name));
     SigninManagerFactory::GetForProfile(
         chromeos::ProfileHelper::GetProfileByUserIdHash(info.hash))
         ->SetAuthenticatedAccountInfo(info.gaia_id, info.email);
@@ skipping 48 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest, MAYBE_BasicDrive) {
   AddAllUsers();
 
   // Sanity check that normal operations work in multi-profile setting as well.
   set_test_case_name("keyboardCopyDrive");
   StartTest();
 }
 
 }  // namespace file_manager