Code:  void DirectoryEntrySync::removeRecursively(ExceptionState& exceptionState)
 {
    RefPtr<VoidSyncCallbackHelper> helper = VoidSyncCallbackHelper::create();
     m_fileSystem->removeRecursively(this, helper->successCallback(), helper->errorCallback(), DOMFileSystemBase::Synchronous);
     helper->getResult(exceptionState);
 }

Vulnerability Type: DoS Overflow 
CWE ID: CWE-119
Summary: The URL loader in Google Chrome before 26.0.1410.43 allows remote attackers to cause a denial of service (out-of-bounds read) via unspecified vectors.
Commit Message: Oilpan: Ship Oilpan for SyncCallbackHelper, CreateFileResult and CallbackWrapper in filesystem/

These are leftovers when we shipped Oilpan for filesystem/ once.

BUG=340522

Review URL: https://codereview.chromium.org/501263003

git-svn-id: svn://svn.chromium.org/blink/trunk@180909 bbb929c8-8fbe-4397-9dbb-9b2b20218538