We call PDFiumParent::Close twice under certain conditions. Once in
PDFiumProcessParent::Delete, and once in PDFiumProcessParent's dtor. So we may
hit MOZ_ABORT which tell us that we are trying to close a closed channel.
This patch prevents hitting this abort by:
1. Only close the channel in PDFiumProcessParent::Delete, remove another call
in PDFiumProcessParent's dtor. (Please see the change in
PDFiumProcessParent.cpp).
2. Remove PDFiumParent::AbortConversion and relative code. We can just use
PDFiumParent::EndConversion instead. When calling PDFiumParent::Close, we
actually close the IPC channel *synchronously*, which means there is no need
to register a callback by PDFiumParent::AbortConversion to receive
actor-destroy callback.
MozReview-Commit-ID: 9i5j6t54J3h
--HG--
extra : rebase_source : 5f74ebc1ecc29e9983c30ca2dd63e0b49bd24a50
5a90745685