https://bugs.webkit.org/show_bug.cgi?id=97734

Reviewed by Oliver Hunt.

Having jsc diverge from WebCore here is not beneficial; it potentially masks bugs and/or performance
problems from command line testing.

* jsc.cpp:
(GlobalObject::create):
    - Create a this value proxy for the global object.
* runtime/JSGlobalObject.h:
(JSGlobalObject):
    - Make setGlobalThis protected.
* runtime/JSProxy.h:
(JSC::JSProxy::create):
(JSC::JSProxy::target):
(JSC::JSProxy::finishCreation):
(JSProxy):
    - Allow proxy target to be a JSObject, add target to create method.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@129711 268f45cc-cd09-0410-ab3c-d52691b4dbfc