Unreviewed, rolling out r142081.
http://trac.webkit.org/changeset/142081
https://bugs.webkit.org/show_bug.cgi?id=109146

The patch caused a crash in inspector-protocol/nmi-webaudio*.html .

See http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=inspector-protocol%2Fnmi-webaudio-leak-test.html and http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=inspector-protocol%2Fnmi-webaudio.html .

* dom/WebCoreMemoryInstrumentation.cpp:
(WebCore):
* inspector/front-end/NativeMemorySnapshotView.js:
(WebInspector.MemoryBlockViewProperties._initialize):
* platform/PlatformMemoryInstrumentation.cpp:
(WebCore):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142166 268f45cc-cd09-0410-ab3c-d52691b4dbfc