[v8] Code calling the typed array optimization script is fragile, depends on typed...

[v8] Code calling the typed array optimization script is fragile, depends on typed array hierarchy.

Install the flag, which indicates whether or not the optimization
script was executed, on the global object.

https://bugs.webkit.org/show_bug.cgi?id=68890

Patch by Ulan Degenbaev <ulan@chromium.org> on 2011-09-27
Reviewed by Kenneth Russell.

* Source/WebCore/bindings/v8/custom/V8ArrayBufferViewCustom.cpp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@96135 268f45cc-cd09-0410-ab3c-d52691b4dbfc