Rename http_transaction_unittest to http_transaction_test_util.

And move it to test support target.

Actually this file contains only utilities for tests, but not tests themselves.

BUG=245436

Review URL: https://codereview.chromium.org/280763003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@270354 0039d316-1c4b-4281-b951-d872f2087c98
14 files changed