https://bugs.webkit.org/show_bug.cgi?id=69478

Reviewed by Darin Adler.

JSC supports a split global object, as used by WebCore for the Window. As a stage
of making this visible to JSC, make it so that if the global this value is not the
global object itself, it must be a subclass of JSGlobalThis.

Source/JavaScriptCore: 

* API/JSCallbackObjectFunctions.h:
(JSC::::finishCreation):
    - Don't pass the thisValue to JSGlobalObject::finishCreation.
* JavaScriptCore.xcodeproj/project.pbxproj:
    - Added JSGlobalThis.h
* jsc.cpp:
(GlobalObject::finishCreation):
    - Don't pass the thisValue to JSGlobalObject::finishCreation.
* runtime/JSGlobalObject.h:
(JSC::JSGlobalObject::create):
(JSC::JSGlobalObject::finishCreation):
    - finishCreation takes a JSGlobalThis, or thisValue is implicit.
* runtime/JSGlobalThis.h: Added.
(JSC::JSGlobalThis::create):
(JSC::JSGlobalThis::JSGlobalThis):
(JSC::JSGlobalThis::finishCreation):
    - Thin wrapper on JSNonFinalObject to allow type checking.
* testRegExp.cpp:
(GlobalObject::finishCreation):
    - Don't pass the thisValue to JSGlobalObject::finishCreation.

Source/JavaScriptGlue: 

* JSRun.h:
(JSGlueGlobalObject::create):
    - Don't pass the thisValue to JSGlobalObject::finishCreation.

Source/WebCore: 

* ForwardingHeaders/runtime/JSGlobalThis.h: Added.
    - Added forwarding header.
* bindings/js/JSDOMGlobalObject.cpp:
(WebCore::JSDOMGlobalObject::finishCreation):
* bindings/js/JSDOMGlobalObject.h:
    - finishCreation takes a JSGlobalThis, or thisValue is implicit.
* bindings/js/JSDOMWindowShell.h:
    - Make the window shell a subclass of JSGlobalThis.
* bindings/js/JSWorkerContextBase.cpp:
(WebCore::JSWorkerContextBase::finishCreation):
    - Don't pass the thisValue to JSGlobalObject::finishCreation.
* bindings/js/JSWorkerContextBase.h:
* bindings/scripts/CodeGeneratorJS.pm:
(GenerateHeader):
    - Don't pass the thisValue to JSGlobalObject::finishCreation,
      for worker contexts.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@96836 268f45cc-cd09-0410-ab3c-d52691b4dbfc