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

chrome/browser/extensions/api/webstore_private/webstore_private_apitest.cc

 // Copyright (c) 2012 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 <vector>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/macros.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/extensions/api/webstore_private/webstore_private_api.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_function_test_utils.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/webstore_installer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 190 matching lines @@
 }
 
 // Test cases where the user accepts the install confirmation dialog.
 IN_PROC_BROWSER_TEST_F(ExtensionWebstorePrivateApiTest, InstallAccepted) {
   ASSERT_TRUE(RunInstallTest("accepted.html", "extension.crx"));
 }
 
 // Test having the default download directory missing.
 IN_PROC_BROWSER_TEST_F(ExtensionWebstorePrivateApiTest, MissingDownloadDir) {
   // Set a non-existent directory as the download path.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   EXPECT_TRUE(temp_dir.CreateUniqueTempDir());
   base::FilePath missing_directory = temp_dir.Take();
   EXPECT_TRUE(base::DeleteFile(missing_directory, true));
   WebstoreInstaller::SetDownloadDirectoryForTests(&missing_directory);
 
   // Now run the install test, which should succeed.
   ASSERT_TRUE(RunInstallTest("accepted.html", "extension.crx"));
 
   // Cleanup.
@@ skipping 182 matching lines @@
 IN_PROC_BROWSER_TEST_F(ExtensionWebstoreGetWebGLStatusTest, Blocked) {
   content::GpuDataManager::GetInstance()->BlacklistWebGLForTesting();
   EXPECT_TRUE(content::GpuDataManager::GetInstance()->IsFeatureBlacklisted(
       gpu::GPU_FEATURE_TYPE_ACCELERATED_WEBGL));
 
   bool webgl_allowed = false;
   RunTest(webgl_allowed);
 }
 
 }  // namespace extensions