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

chrome/browser/chromeos/file_manager/fileapi_util.h

Index: chrome/browser/chromeos/file_manager/fileapi_util.h
diff --git a/chrome/browser/chromeos/file_manager/fileapi_util.h b/chrome/browser/chromeos/file_manager/fileapi_util.h
index 305857a6e36983a2857d2c00a24d47fe9f9fbdfb..fe9c52fb4a4c6e3e7c4566c01f212c1f7670c1bd 100644
--- a/chrome/browser/chromeos/file_manager/fileapi_util.h
+++ b/chrome/browser/chromeos/file_manager/fileapi_util.h
@@ -13,6 +13,7 @@
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "url/gurl.h"
+#include "webkit/browser/fileapi/file_system_operation_runner.h"
 
 class Profile;
 
@@ -124,6 +125,12 @@ void ConvertFileDefinitionListToEntryDefinitionList(
     const FileDefinitionList& file_definition_list,
     const EntryDefinitionListCallback& callback);
 
+// Checks if a directory exists at |url|.
+void CheckIfDirectoryExists(
+    scoped_refptr<fileapi::FileSystemContext> file_system_context,
+    const GURL& url,
+    const fileapi::FileSystemOperationRunner::StatusCallback& callback);
+
 }  // namespace util
 }  // namespace file_manager