These messages are only used by web_test/blink_test_{controller,runner}.
So move them into common/web_test, to indicate they are for tests not
content shell.
Also give them their own target so that test_runner can be made to use
them, since they are only for tests. I believe this would let us move
BlinkTestRunner into test_runner, and remove WebTestDelegate interface
out of content/shell/renderer.
R=avi@chromium.org
TBR=inferno
Bug: 866140
Change-Id: I4e397f3bb2b3ae834f62f429761edc184d16151f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1525181
Commit-Queue: danakj <danakj@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#645319}
c113169ee6