Http cache: Test deleting an entry with a pending_entry when
adding the truncated flag.

BUG=125159
TEST=net_unittests
Review URL: https://chromiumcodereview.appspot.com/10356113

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@139331 0039d316-1c4b-4281-b951-d872f2087c98
  ~FastTransactionServer() {}

  ~FastTransactionServer() {}
