tree a29a33b91afe7bb05d97db6389e1f435a9019ea6
parent 923886a86013fbba05d00dd64d4ddc9b9a6dffe4
author Alex Deymo <deymo@google.com> 1458072725 -0700
committer Alex Deymo <deymo@google.com> 1458079898 +0000

Fix use-after-free in HttpFetcher's code.

Calling HttpFetcherDelegate::TransferComplete() or TransferTerminated()
on the transfer delegate is allowed to destroy the HttpFetcher that
called it.

While we don't do this from our code, the unittests excercise this path
destroying the HttpFetcher. This code prevents a use-after-free once
the TransferComplete() delegate method is called from CurlPerformOnce().

Bug: chromium:595068
TEST=USE="clang asan" FEATURES=test emerge-link update_engine

Change-Id: I73317eae092ed4ac1ccad5c3fc68b25ad8bb387c