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

chrome/browser/extensions/api/file_system/file_system_apitest_chromeos.cc

Index: chrome/browser/extensions/api/file_system/file_system_apitest_chromeos.cc
diff --git a/chrome/browser/extensions/api/file_system/file_system_apitest_chromeos.cc b/chrome/browser/extensions/api/file_system/file_system_apitest_chromeos.cc
index b6e67fa31a8c7733d284268f7807f4356891243e..f5b5d00b8d82665fcad3cade9c62d2f3b9b6a5a9 100644
--- a/chrome/browser/extensions/api/file_system/file_system_apitest_chromeos.cc
+++ b/chrome/browser/extensions/api/file_system/file_system_apitest_chromeos.cc
@@ -9,6 +9,7 @@
 #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"
 
@@ -27,6 +28,7 @@ class FileSystemApiTestForDrive : public PlatformAppBrowserTest {
   // real DriveIntegrationService instance is created.)
   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
     PlatformAppBrowserTest::SetUpInProcessBrowserTestFixture();
+    extensions::ComponentLoader::EnableBackgroundExtensionsForTesting();
 
     ASSERT_TRUE(test_cache_root_.CreateUniqueTempDir());