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

chrome/browser/apps/app_shim/app_shim_interactive_uitest_mac.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
 #include "apps/app_lifetime_monitor_factory.h"
 #include "apps/switches.h"
 #include "base/auto_reset.h"
 #include "base/mac/foundation_util.h"
 #import "base/mac/launch_services_util.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #include "base/path_service.h"
 #include "base/process/launch.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/test/scoped_feature_list.h"
 #include "base/test/test_timeouts.h"
+#include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/apps/app_shim/app_shim_handler_mac.h"
 #include "chrome/browser/apps/app_shim/app_shim_host_manager_mac.h"
 #include "chrome/browser/apps/app_shim/extension_app_shim_handler_mac.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/launch_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
@@ skipping 223 matching lines @@
       break;
     case APP_TYPE_HOSTED:
       app = InstallHostedApp();
       break;
   }
 
   // Note that usually an install triggers shim creation, but that's disabled
   // (always) in tests. If it wasn't the case, the following test would fail
   // (but flakily since the creation happens on the FILE thread).
   shim_path_ = GetAppShimPath(profile(), app);
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   EXPECT_FALSE(base::PathExists(shim_path_));
 
   // To create a shim in a test, instead call UpdateAllShortcuts, which has been
   // blessed by g_app_shims_allow_update_and_launch_in_tests.
   base::RunLoop run_loop;
   web_app::UpdateAllShortcuts(base::string16(), profile(), app,
                               run_loop.QuitClosure());
   run_loop.Run();
   EXPECT_TRUE(base::PathExists(shim_path_));
   return app;
@@ skipping 350 matching lines @@
   // the shim is rebuilt.
   WindowedAppShimLaunchObserver(app->id()).Wait();
 
   EXPECT_TRUE(GetFirstAppWindow());
   EXPECT_TRUE(HasAppShimHost(profile(), app->id()));
 }
 
 #endif  // defined(ARCH_CPU_64_BITS)
 
 }  // namespace apps