[Devtools] Adjusted font size for new network timeline

[Devtools] Adjusted font size for new network timeline

Adjusts the font size of the new network timeline dividers per
paulirish@ request.

See: http://imgur.com/a/TJOUk

R=paulirish,dgozman,alph
BUG=653738

[allada, 2016-11-03 20:34:59]

PTL

[allada, 2016-11-03 20:40:59]

The CQ bit was checked by allada@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-03 20:41:44]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-03 22:12:19]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-03 22:12:20]

Dry run: Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[dgozman, 2016-11-03 22:30:36]

lgtm

[allada, 2016-11-04 00:23:22]

The CQ bit was checked by allada@chromium.org

[commit-bot: I haz the power, 2016-11-04 00:24:16]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-04 04:01:08]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-04 04:01:09]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[allada, 2016-11-04 04:24:07]

The CQ bit was checked by allada@chromium.org