Add components_browsertests to trybot.

Add components_browsertests to trybot.

This CL adds the components_browsertests target to android, linux,
mac and windows platforms.

BUG=311270
Committed: https://crrev.com/12bec1740abec524ee2cee69fdb73acdc80fe8b0
Cr-Commit-Position: refs/heads/master@{#295199}

[nyquist, 2014-09-16 22:10:50]

nyquist@chromium.org changed reviewers:
+ phajdan.jr@chromium.org

[nyquist, 2014-09-16 22:10:51]

phajdan.jr: PTAL

[Paweł Hajdan Jr., 2014-09-16 22:31:56]

https://codereview.chromium.org/578653003/diff/20001/testing/buildbot/chromiu...
File testing/buildbot/chromium_trybot.json (right):

https://codereview.chromium.org/578653003/diff/20001/testing/buildbot/chromiu...
testing/buildbot/chromium_trybot.json:35: "platforms": ["linux", "mac", "win"]
This is not needed since the test runs on all platforms. Please remove.

[nyquist, 2014-09-16 22:49:53]

phajdan.jr: PTAL

https://codereview.chromium.org/578653003/diff/20001/testing/buildbot/chromiu...
File testing/buildbot/chromium_trybot.json (right):

https://codereview.chromium.org/578653003/diff/20001/testing/buildbot/chromiu...
testing/buildbot/chromium_trybot.json:35: "platforms": ["linux", "mac", "win"]
On 2014/09/16 22:31:56, Paweł Hajdan Jr. wrote:
> This is not needed since the test runs on all platforms. Please remove.

Done.

[Paweł Hajdan Jr., 2014-09-17 00:07:54]

LGTM

[nyquist, 2014-09-17 00:18:46]

The CQ bit was checked by nyquist@chromium.org

[commit-bot: I haz the power, 2014-09-17 00:20:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/578653003/40001

[commit-bot: I haz the power, 2014-09-17 00:56:20]

Committed patchset #3 (id:40001) as 20adfabc3375cba00449a3a803fab5215f294fa1

[commit-bot: I haz the power, 2014-09-17 00:56:54]

Patchset 3 (id:??) landed as
https://crrev.com/12bec1740abec524ee2cee69fdb73acdc80fe8b0
Cr-Commit-Position: refs/heads/master@{#295199}