Web Inspector: Get rid of native-memory-snapshot in performance test

Web Inspector: Get rid of native-memory-snapshot in performance test
https://bugs.webkit.org/show_bug.cgi?id=116013

Patch by Seokju Kwon <seokju.kwon@gmail.com> on 2013-05-13
Reviewed by Andreas Kling.

Remove native-memory-snapshot.html from PerformanceTests.

* inspector/native-memory-snapshot.html: Removed.
* inspector/performance-test.js:
(initialize_TimeTracker.Timer):
(initialize_TimeTracker.Timer.prototype._dump):
(initialize_TimeTracker.InspectorTest.runPerformanceTest):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@150009 268f45cc-cd09-0410-ab3c-d52691b4dbfc