Used to initialize parameters on the global object.
Created attachment 41754 [details] The patch
Comment on attachment 41754 [details] The patch r=me
Sending WebCore/ChangeLog Sending WebCore/WebCore.base.exp Sending WebCore/bindings/js/ScriptController.cpp Sending WebCore/bindings/js/ScriptController.h Sending WebKit/mac/ChangeLog Sending WebKit/mac/WebView/WebFrame.mm Sending WebKit/mac/WebView/WebFramePrivate.h Sending WebKit/win/ChangeLog Sending WebKit/win/WebFrame.cpp Sending WebKit/win/WebFrame.h Transmitting file data .......... Committed revision 50012.
Based on the above comments this was already landed.