Allow printf style var args for messages in REPORTER_ASSERT.

Remove REPORTER_ASSERT_MESSAGE.

Change-Id: I6d00715901159c93e22d182fe24aac92b5fdbcf4
Reviewed-on: https://skia-review.googlesource.com/100361
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
15 files changed