There were a couple of bug fixes to this code on IA32 which have not yet
been ported to ARM.  They are: failure to correctly handle non-JSObject
receivers and failure to restore the context register after calling JS code.

Review URL: http://codereview.chromium.org/6479019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6744 ce2b1a6d-e550-0410-aec6-3dcde31c8c00