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

chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_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.
 
 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
 
 #include <stddef.h>
 
 #include "ash/shell.h"
 #include "ash/wallpaper/wallpaper_controller.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_test_utils.h"
 #include "chrome/browser/ui/ash/session_controller_client.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "chromeos/chromeos_switches.h"
 #include "components/prefs/scoped_user_pref_update.h"
 #include "components/session_manager/core/session_manager.h"
@@ skipping 66 matching lines @@
     base::RunLoop().RunUntilIdle();
   }
 
  protected:
 
   // Return custom wallpaper path. Create directory if not exist.
   base::FilePath GetCustomWallpaperPath(
       const char* sub_dir,
       const wallpaper::WallpaperFilesId& wallpaper_files_id,
       const std::string& id) {
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
     base::FilePath wallpaper_path =
         WallpaperManager::Get()->GetCustomWallpaperPath(sub_dir,
                                                         wallpaper_files_id, id);
     if (!base::DirectoryExists(wallpaper_path.DirName()))
       base::CreateDirectory(wallpaper_path.DirName());
 
     return wallpaper_path;
   }
 
   // Logs in |account_id|.
   void LogIn(const AccountId& account_id, const std::string& user_id_hash) {
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
     SessionManager::Get()->CreateSession(account_id, user_id_hash);
     SessionManager::Get()->SessionStarted();
     // Flush to ensure the created session and ACTIVE state reaches ash.
     SessionControllerClient::FlushForTesting();
     WaitAsyncWallpaperLoadStarted();
   }
 
   // Logs in |account_id| and sets it as child account.
   void LogInAsChild(const AccountId& account_id,
                     const std::string& user_id_hash) {
@@ skipping 19 matching lines @@
 
   void ClearDisposableWallpaperCache() {
     WallpaperManager::Get()->ClearDisposableWallpaperCache();
   }
 
   // Initializes default wallpaper paths "*default_*file" and writes JPEG
   // wallpaper images to them.
   // Only needs to be called (once) by tests that want to test loading of
   // default wallpapers.
   void CreateCmdlineWallpapers() {
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
     wallpaper_dir_.reset(new base::ScopedTempDir);
     ASSERT_TRUE(wallpaper_dir_->CreateUniqueTempDir());
     wallpaper_manager_test_utils::CreateCmdlineWallpapers(
         *wallpaper_dir_, &wallpaper_manager_command_line_);
   }
 
   ash::WallpaperController* controller_;
   PrefService* local_state_;
   std::unique_ptr<base::CommandLine> wallpaper_manager_command_line_;
 
@@ skipping 659 matching lines @@
 
   WallpaperManager::Get()->SetDefaultWallpaperNow(EmptyAccountId());
   wallpaper_manager_test_utils::WaitAsyncWallpaperLoadFinished();
 
   EXPECT_TRUE(wallpaper_manager_test_utils::ImageIsNearColor(
       controller_->GetWallpaper(),
       wallpaper_manager_test_utils::kSmallDefaultWallpaperColor));
 }
 
 }  // namespace chromeos