PageThrottler effectively implements a bespoke weak pointer mechanism; remove this & just use WeakPtr.
Created attachment 225517 [details] Fix
Created attachment 225543 [details] Build fix (odd; works for me :-/)
Transmitting file data ..... Committed revision 164914.
Comment on attachment 225517 [details] Fix Cleared Sam Weinig's review+ from obsolete attachment 225517 [details] so that this bug does not appear in http://webkit.org/pending-commit.