Remove two more StorageTask types
https://bugs.webkit.org/show_bug.cgi?id=115312

Reviewed by Dean Jackson.

* storage/StorageTask.cpp:
(WebCore::StorageTask::performTask):
* storage/StorageTask.h:
* storage/StorageTracker.cpp:
(WebCore::StorageTracker::setOriginDetails):
(WebCore::StorageTracker::deleteOrigin):
* storage/StorageTracker.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149245 268f45cc-cd09-0410-ab3c-d52691b4dbfc