Temporarily stop launching Chrome in installer test runs.

Temporarily stop launching Chrome in installer test runs.

The bot runner dies sometimes when running this test. Disable the part
of the test that launches Chrome to see if that makes the failures go
away. This change also makes the logs a bit more informative by added
date, time, file, and line info in the same format as Chrome's logging.
It also enables verbose logging for Chrome's installer.

BUG=402081
NOTRY=true
TBR=gab@chromium.org

Committed: https://crrev.com/033f3af0a8b2dc3286d764ffc6140f687085fe66
Cr-Commit-Position: refs/heads/master@{#294180}

[grt (UTC plus 2), 2014-09-10 15:17:16]

Hi Gab. Please take a look. I'll land this straight away once it passes on the
one trybot. Thanks.

[grt (UTC plus 2), 2014-09-10 16:45:01]

On 2014/09/10 15:17:16, grt wrote:
> Hi Gab. Please take a look. I'll land this straight away once it passes on the
> one trybot. Thanks.

TBRing as discussed.

[grt (UTC plus 2), 2014-09-10 16:45:11]

The CQ bit was checked by grt@chromium.org

[commit-bot: I haz the power, 2014-09-10 16:46:33]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/grt@chromium.org/545373004/20001

[commit-bot: I haz the power, 2014-09-10 16:52:47]

Committed patchset #2 (id:20001) as 32124f57f8b6298590cd1a533d0be40cb06ebe97

[gab, 2014-09-10 16:53:51]

lgtm

[commit-bot: I haz the power, 2014-09-10 16:55:01]

Patchset 2 (id:??) landed as
https://crrev.com/033f3af0a8b2dc3286d764ffc6140f687085fe66
Cr-Commit-Position: refs/heads/master@{#294180}