Revert r85550 and r85575.

Revert r85550 and r85575.

Rubber-stamped by Adam Roben.

Variables cannot be exported via the .def file. Instead, they should be annotated with
JS_EXPORTDATA.

* JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
* runtime/Structure.cpp:
(JSC::Structure::materializePropertyMap):
* runtime/Structure.h:
(JSC::Structure::typeInfo):
(JSC::Structure::previousID):
(JSC::Structure::propertyStorageCapacity):
(JSC::Structure::propertyStorageSize):
(JSC::Structure::get):
(JSC::Structure::materializePropertyMapIfNecessary):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@85605 268f45cc-cd09-0410-ab3c-d52691b4dbfc