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

extensions/browser/guest_view/app_view/app_view_apitest.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 "base/command_line.h"
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
+#include "base/threading/thread_restrictions.h"
 #include "components/guest_view/browser/guest_view_manager.h"
 #include "components/guest_view/browser/guest_view_manager_factory.h"
 #include "components/guest_view/browser/test_guest_view_manager.h"
 #include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/browser/app_window/app_window.h"
 #include "extensions/browser/app_window/app_window_registry.h"
@@ skipping 87 matching lines @@
   }
 
   content::WebContents* GetFirstAppWindowWebContents() {
     const AppWindowRegistry::AppWindowList& app_window_list =
         AppWindowRegistry::Get(browser_context_)->app_windows();
     DCHECK(app_window_list.size() == 1);
     return (*app_window_list.begin())->web_contents();
   }
 
   const Extension* LoadApp(const std::string& app_location) {
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
     base::FilePath test_data_dir;
     PathService::Get(DIR_TEST_DATA, &test_data_dir);
     test_data_dir = test_data_dir.AppendASCII(app_location.c_str());
     return extension_system_->LoadApp(test_data_dir);
   }
 
   void RunTest(const std::string& test_name,
                const std::string& app_location,
                const std::string& app_to_embed) {
     const Extension* app_embedder = LoadApp(app_location);
@@ skipping 88 matching lines @@
 #endif
 // Tests that <appview> is able to navigate to another installed app.
 IN_PROC_BROWSER_TEST_P(AppViewTest,
                        MAYBE_TestAppViewWithUndefinedDataShouldSucceed) {
   RunTest("testAppViewWithUndefinedDataShouldSucceed",
           "app_view/apitest",
           "app_view/apitest/skeleton");
 }
 
 }  // namespace extensions