Revert of "Lazily constructed bespoke cancellable timer task."

Revert of "Lazily constructed bespoke cancellable timer task."

Looks like the patch broke
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=http%2Ftests%2Fnotifications%2Fserviceworker-notificationclick-openwindow-crash.html

This patch reverts https://codereview.chromium.org/1185643002/

The revert button on the WEB UI didn't work, for soem reason I
don't understand the patch failed to apply so I'm doing it
manually :/

BUG=498229, 463143
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=197840

[alex clarke (OOO till 29th), 2015-06-25 16:44:12]

alexclarke@chromium.org changed reviewers:
+ eae@chromium.org

[alex clarke (OOO till 29th), 2015-06-25 16:44:12]

Looks like I had to revert this manually :(

[eae, 2015-06-25 16:47:47]

On 2015/06/25 16:44:12, alexclarke1 wrote:
> Looks like I had to revert this manually :(

LGTM

[eae, 2015-06-25 16:47:50]

The CQ bit was checked by eae@chromium.org

[alex clarke (OOO till 29th), 2015-06-25 16:48:02]

The CQ bit was checked by alexclarke@chromium.org

[commit-bot: I haz the power, 2015-06-25 16:48:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1210103002/1

[commit-bot: I haz the power, 2015-06-25 16:52:03]

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

[commit-bot: I haz the power, 2015-06-25 16:52:04]

Try jobs failed on following builders:
  mac_blink_compile_dbg on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/mac_blink_compile_dbg/bu...)
  mac_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/60780)

[alex clarke (OOO till 29th), 2015-06-25 17:03:17]

The CQ bit was checked by alexclarke@chromium.org

[alex clarke (OOO till 29th), 2015-06-25 17:03:18]

The patchset sent to the CQ was uploaded after l-g-t-m from eae@chromium.org
Link to the patchset: https://codereview.chromium.org/1210103002/#ps20001
(title: "Rebased")

[commit-bot: I haz the power, 2015-06-25 17:03:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1210103002/20001

[commit-bot: I haz the power, 2015-06-25 18:12:48]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=197840

[sof, 2015-06-25 18:27:44]

sigbjornf@opera.com changed reviewers:
+ sigbjornf@opera.com

[sof, 2015-06-25 18:27:45]

lgtm.

it didn't apply cleanly due to http://crrev.com/1211883002 , i'm guessing.