Fix re-entrancy bug in SimpleDataSource::Abort() introduced in r118338.

BUG=112180
TEST=none

Review URL: https://chromiumcodereview.appspot.com/9344003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@120714 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed