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_base.cc

 // Copyright 2015 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 "chrome/browser/chromeos/file_manager/file_manager_browsertest_base.h"
 
 #include <stddef.h>
 
 #include <deque>
 
 #include "base/json/json_reader.h"
 #include "base/json/json_value_converter.h"
 #include "base/json/json_writer.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/strings/string_piece.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/file_manager/app_id.h"
 #include "chrome/browser/chromeos/file_manager/mount_test_util.h"
 #include "chrome/browser/chromeos/file_manager/path_util.h"
 #include "chrome/browser/chromeos/file_manager/volume_manager.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 590 matching lines @@
     if (HasFatalFailure())
       break;
 
     entry.function->Reply(output);
   }
 }
 
 void FileManagerBrowserTestBase::OnMessage(const std::string& name,
                                            const base::DictionaryValue& value,
                                            std::string* output) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   if (name == "getTestName") {
     // Pass the test case name.
     *output = GetTestCaseNameParam();
     return;
   }
 
   if (name == "getRootPaths") {
     // Pass the root paths.
     base::DictionaryValue res;
     res.SetString("downloads",
@@ skipping 114 matching lines @@
 }
 
 drive::DriveIntegrationService*
 FileManagerBrowserTestBase::CreateDriveIntegrationService(Profile* profile) {
   drive_volumes_[profile->GetOriginalProfile()].reset(new DriveTestVolume());
   return drive_volumes_[profile->GetOriginalProfile()]
       ->CreateDriveIntegrationService(profile);
 }
 
 }  // namespace file_manager