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

chrome/browser/chrome_service_worker_browsertest.cc

 // Copyright 2014 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.
 
 // This file tests that Service Workers (a Content feature) work in the Chromium
 // embedder.
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/run_loop.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/chrome_notification_types.h"
 #include "chrome/browser/content_settings/host_content_settings_map_factory.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/base/in_process_browser_test.h"
@@ skipping 15 matching lines @@
   ChromeServiceWorkerTest() {
     EXPECT_TRUE(service_worker_dir_.CreateUniqueTempDir());
     EXPECT_TRUE(base::CreateDirectoryAndGetError(
         service_worker_dir_.GetPath().Append(
             FILE_PATH_LITERAL("scope")), nullptr));
   }
   ~ChromeServiceWorkerTest() override {}
 
   void WriteFile(const base::FilePath::StringType& filename,
                  base::StringPiece contents) {
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
     EXPECT_EQ(base::checked_cast<int>(contents.size()),
               base::WriteFile(service_worker_dir_.GetPath().Append(filename),
                               contents.data(), contents.size()));
   }
 
   base::ScopedTempDir service_worker_dir_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ChromeServiceWorkerTest);
 };
@@ skipping 543 matching lines @@
             ExecutePNACLUrlLoaderTest("OtherCredentials"));
 }
 
 IN_PROC_BROWSER_TEST_F(ChromeServiceWorkerFetchPPAPIPrivateTest,
                        OtherOriginCORSCredentials) {
   EXPECT_EQ(GetRequestStringForPNACL("#OtherCORSCredentials"),
             ExecutePNACLUrlLoaderTest("OtherCORSCredentials"));
 }
 
 }  // namespace