Implement IsNonNativeLocalPathDirectory for supporting non-local non-Drive directory access in apps.

chrome/browser/extensions/api/file_system/file_system_apitest_chromeos.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/apps/app_browsertest_util.h"
 #include "chrome/browser/chromeos/drive/drive_integration_service.h"
 #include "chrome/browser/chromeos/drive/file_system_interface.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/drive/test_util.h"
 #include "chrome/browser/drive/fake_drive_service.h"
 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
+#include "chrome/browser/extensions/component_loader.h"
 #include "content/public/test/test_utils.h"
 #include "google_apis/drive/test_util.h"
 
 namespace extensions {
 
 // This class contains chrome.filesystem API test specific to Chrome OS, namely,
 // the integrated Google Drive support.
 class FileSystemApiTestForDrive : public PlatformAppBrowserTest {
  public:
   FileSystemApiTestForDrive()
       : fake_drive_service_(NULL),
         integration_service_(NULL) {
   }
 
   // Sets up fake Drive service for tests (this has to be injected before the
   // real DriveIntegrationService instance is created.)
   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
     PlatformAppBrowserTest::SetUpInProcessBrowserTestFixture();
+    extensions::ComponentLoader::EnableBackgroundExtensionsForTesting();
 
     ASSERT_TRUE(test_cache_root_.CreateUniqueTempDir());
 
     create_drive_integration_service_ =
         base::Bind(&FileSystemApiTestForDrive::CreateDriveIntegrationService,
                    base::Unretained(this));
     service_factory_for_test_.reset(
         new drive::DriveIntegrationServiceFactory::ScopedFactoryForTest(
             &create_drive_integration_service_));
   }
@@ skipping 136 matching lines @@
       drive::util::GetDriveMountPointPath(browser()->profile()).AppendASCII(
           "root/subdir");
   FileSystemChooseEntryFunction::SkipPickerAndAlwaysSelectPathForTest(
       &test_directory);
   ASSERT_TRUE(RunPlatformAppTest(
       "api_test/file_system/open_directory_with_only_write"))
       << message_;
 }
 
 }  // namespace extensions