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

chrome/browser/ui/startup/startup_browser_creator_interactive_uitest.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 <vector>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/run_loop.h"
+#include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/session_startup_pref.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/sessions/session_restore.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/startup/startup_browser_creator.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 typedef InProcessBrowserTest StartupBrowserCreatorTest;
 
 // Chrome OS doesn't support multiprofile.
 // And BrowserWindow::IsActive() always returns false in tests on MAC.
 // And this test is useless without that functionality.
 #if !defined(OS_CHROMEOS) && !defined(OS_MACOSX)
 IN_PROC_BROWSER_TEST_F(StartupBrowserCreatorTest, LastUsedProfileActivated) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   ProfileManager* profile_manager = g_browser_process->profile_manager();
 
   // Create 4 profiles, they will be scheduled for destruction when the last
   // browser window they are associated to will be closed.
   Profile* profile_1 = profile_manager->GetProfile(
       profile_manager->user_data_dir().Append(FILE_PATH_LITERAL(
           "New Profile 1")));
   ASSERT_TRUE(profile_1);
   Profile* profile_2 = profile_manager->GetProfile(
       profile_manager->user_data_dir().Append(FILE_PATH_LITERAL(
@@ skipping 50 matching lines @@
   new_browser = chrome::FindBrowserWithProfile(profile_3);
   ASSERT_TRUE(new_browser);
   EXPECT_FALSE(new_browser->window()->IsActive());
 
   ASSERT_EQ(1u, chrome::GetBrowserCount(profile_4));
   new_browser = chrome::FindBrowserWithProfile(profile_4);
   ASSERT_TRUE(new_browser);
   EXPECT_FALSE(new_browser->window()->IsActive());
 }
 #endif  // !OS_MACOSX && !OS_CHROMEOS