Fix app_shell shutdown crash due to BrowserContextKeyedServices

chrome/browser/chromeos/file_manager/external_filesystem_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 "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/drive/drive_integration_service.h"
@@ skipping 273 matching lines @@
   base::ScopedTempDir tmp_dir_;
   base::FilePath mount_point_dir_;
 };
 
 // Tests for a drive file system.
 class DriveFileSystemExtensionApiTest : public FileSystemExtensionApiTestBase {
  public:
   DriveFileSystemExtensionApiTest() : fake_drive_service_(NULL) {}
   virtual ~DriveFileSystemExtensionApiTest() {}
 
+  virtual void TearDown() OVERRIDE {
+    FileSystemExtensionApiTestBase::TearDown();
+    drive::DriveIntegrationServiceFactory::SetFactoryForTest(NULL);
+  }
+
   // FileSystemExtensionApiTestBase OVERRIDE.
   virtual void InitTestFileSystem() OVERRIDE {
     // Set up cache root to be used by DriveIntegrationService. This has to be
     // done before the browser is created because the service instance is
     // initialized by EventRouter.
     ASSERT_TRUE(test_cache_root_.CreateUniqueTempDir());
 
+    create_drive_integration_service_ = base::Bind(
+        &DriveFileSystemExtensionApiTest::CreateDriveIntegrationService,
+        base::Unretained(this));
     drive::DriveIntegrationServiceFactory::SetFactoryForTest(
-        base::Bind(
-            &DriveFileSystemExtensionApiTest::CreateDriveIntegrationService,
-            base::Unretained(this)));
+        &create_drive_integration_service_);
   }
 
   // FileSystemExtensionApiTestBase OVERRIDE.
   virtual void AddTestMountPoint() OVERRIDE {
     test_util::WaitUntilDriveMountPointIsAdded(browser()->profile());
   }
 
  protected:
   // DriveIntegrationService factory function for this test.
   drive::DriveIntegrationService* CreateDriveIntegrationService(
       Profile* profile) {
     fake_drive_service_ = new drive::FakeDriveService;
     fake_drive_service_->LoadResourceListForWapi(kTestRootFeed);
     fake_drive_service_->LoadAccountMetadataForWapi(
         "gdata/account_metadata.json");
     fake_drive_service_->LoadAppListForDriveApi("drive/applist.json");
 
     return new drive::DriveIntegrationService(
         profile, NULL,
         fake_drive_service_, test_cache_root_.path(), NULL);
   }
 
   base::ScopedTempDir test_cache_root_;
   drive::FakeDriveService* fake_drive_service_;
+  drive::DriveIntegrationServiceFactory::FactoryCallback
+      create_drive_integration_service_;
 };
 
 //
 // LocalFileSystemExtensionApiTests.
 //
 
 IN_PROC_BROWSER_TEST_F(LocalFileSystemExtensionApiTest, FileSystemOperations) {
   EXPECT_TRUE(RunFileSystemExtensionApiTest(
       "file_browser/filesystem_operations_test",
       FILE_PATH_LITERAL("manifest.json"),
@@ skipping 88 matching lines @@
   fake_drive_service_->set_default_max_results(1);
   EXPECT_TRUE(RunFileSystemExtensionApiTest(
       "file_browser/handler_test_runner",
       FILE_PATH_LITERAL("manifest.json"),
       "file_browser/app_file_handler",
       FLAGS_USE_FILE_HANDLER)) << message_;
 }
 
 }  // namespace
 }  // namespace file_manager