Remove DelayBasedTimeSourceHighRes Class altogether

Remove DelayBasedTimeSourceHighRes Class altogether

This is patch removes DelayBasedTimeSourceHighRes class which is
no more used by begin_frame_source.cc due to
https://codereview.chromium.org/797893003/

BUG=492033
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/947c19e03d532a4289033b03a576ab740d216652
Cr-Commit-Position: refs/heads/master@{#331744}

[Abhishek Kanike, 2015-05-27 12:56:08]

abhishek.ka@samsung.com changed reviewers:
+ kphanee@chromium.org, sivagunturi@chromium.org, vivekg@chromium.org

[Abhishek Kanike, 2015-05-27 13:00:30]

abhishek.ka@samsung.com changed reviewers:
+ brianderson@chromium.org
- kphanee@chromium.org, sivagunturi@chromium.org, vivekg@chromium.org

[brianderson, 2015-05-27 19:31:48]

Thanks! lgtm.

[Abhishek Kanike, 2015-05-28 05:08:42]

The CQ bit was checked by abhishek.ka@samsung.com

[commit-bot: I haz the power, 2015-05-28 05:09:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1146283005/1

[commit-bot: I haz the power, 2015-05-28 06:14:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-28 06:14:51]

Patchset 1 (id:??) landed as
https://crrev.com/947c19e03d532a4289033b03a576ab740d216652
Cr-Commit-Position: refs/heads/master@{#331744}