Fix a memory stomper possible during redirect of an HTTP POST:
Fix a memory stomper possible during redirect of an HTTP POST:

Hold a reference to UploadData from UploadDataStream, so it can't be deleted while in use.

TODO: Regression test in a follow-up patch.

BUG=74585
Review URL: http://codereview.chromium.org/6783027

git-svn-id: http://src.chromium.org/svn/trunk/src@80074 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 292e778bc8366f49304c339a2960dcc87512cebd
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser