2013-12-09 Antonio Gomes <a1.gomes@sisa.samsung.com>
        Properly use WeakPtrFactory in WebCLProgram
        Issue #370

        Reviewed by Igor.

        By making WeakPtrFactory a WebCLProgram class member,
        it goes out of scope together with the class, and null-out
        the WebCLProgram weak ptr properly.

        * Modules/webcl/WebCLProgram.cpp:
        (WebCore::WebCLProgram::build):
Update read me