Revert of [cherrypick] Fix computation of runtime for throttled tasks

Revert of [cherrypick] Fix computation of runtime for throttled tasks (patchset #2 id:20001 of https://codereview.chromium.org/1730153005/ )

Reason for revert:
The reason for reverting is: Speculative revert for Compile failure on Win, Mac
& Precise 64 Beta Bots (crbug.com/590286) 

Original issue's description:
> [cherrypick] Fix computation of runtime for throttled tasks
> 
> The computation of the delayed task runtime was computing the (virtual)
> TimeDomain's now + delay.  That doesn't take into account the skew
> between the real time and the virtual time, which meant timers could
> run sooner than expected for background tabs.  Timers associated with
> foreground tabs are unaffected.
> 
> This patch makes the computation of delayed runtime  the responsibility
> of the TimeDomain and introduces a ThrottledTimeDomain which computes
> the delayed runtime as realtime + delay.
> 
> This means timers will no longer run sooner than expected.  Under normal
> circumstancs this only timers whose delay modulo 1000ms is less than 100
> ms are less likely to be affected.  Timers whose whose delay modulo
> 1000ms is greater than 900 are highly likely to be affected (there's a
> good chance their delay was too small before).
> 
> BUG=587074
> 
> Review URL: https://codereview.chromium.org/1718233002
> 
> Cr-Commit-Position: refs/heads/master@{#376993}
> (cherry picked from commit b56bbe4ce3e7276a130a00d83cf00e5672cd6be1)
> 
> R=skyostil@chromium.org
> 
> Committed: https://chromium.googlesource.com/chromium/src/+/fd563254490ae93382cb88a1e9a1c1e54815c97b

TBR=skyostil@chromium.org,alexclarke@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=587074

[jaydasika, 2016-02-26 23:33:33]

Created Revert of [cherrypick] Fix computation of runtime for throttled tasks

[commit-bot: I haz the power, 2016-02-26 23:41:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1743813002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1743813002/1

[jaydasika, 2016-02-26 23:41:33]

The CQ bit was unchecked by jaydasika@chromium.org

[jaydasika, 2016-02-26 23:41:33]

The CQ bit was checked by jaydasika@chromium.org

[commit-bot: I haz the power, 2016-02-26 23:49:22]

Description was changed from

==========
Revert of [cherrypick] Fix computation of runtime for throttled tasks (patchset
#2 id:20001 of https://codereview.chromium.org/1730153005/ )

Reason for revert:
The reason for reverting is: Speculative revert for Compile failure on Win, Mac
& Precise 64 Beta Bots (crbug.com/590286) 

Original issue's description:
> [cherrypick] Fix computation of runtime for throttled tasks
> 
> The computation of the delayed task runtime was computing the (virtual)
> TimeDomain's now + delay.  That doesn't take into account the skew
> between the real time and the virtual time, which meant timers could
> run sooner than expected for background tabs.  Timers associated with
> foreground tabs are unaffected.
> 
> This patch makes the computation of delayed runtime  the responsibility
> of the TimeDomain and introduces a ThrottledTimeDomain which computes
> the delayed runtime as realtime + delay.
> 
> This means timers will no longer run sooner than expected.  Under normal
> circumstancs this only timers whose delay modulo 1000ms is less than 100
> ms are less likely to be affected.  Timers whose whose delay modulo
> 1000ms is greater than 900 are highly likely to be affected (there's a
> good chance their delay was too small before).
> 
> BUG=587074
> 
> Review URL: https://codereview.chromium.org/1718233002
> 
> Cr-Commit-Position: refs/heads/master@{#376993}
> (cherry picked from commit b56bbe4ce3e7276a130a00d83cf00e5672cd6be1)
> 
> R=skyostil@chromium.org
> 
> Committed:
https://chromium.googlesource.com/chromium/src/+/fd563254490ae93382cb88a1e9a1...

TBR=skyostil@chromium.org,alexclarke@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=587074
==========

to

==========
Revert of [cherrypick] Fix computation of runtime for throttled tasks (patchset
#2 id:20001 of https://codereview.chromium.org/1730153005/ )

Reason for revert:
The reason for reverting is: Speculative revert for Compile failure on Win, Mac
& Precise 64 Beta Bots (crbug.com/590286) 

Original issue's description:
> [cherrypick] Fix computation of runtime for throttled tasks
> 
> The computation of the delayed task runtime was computing the (virtual)
> TimeDomain's now + delay.  That doesn't take into account the skew
> between the real time and the virtual time, which meant timers could
> run sooner than expected for background tabs.  Timers associated with
> foreground tabs are unaffected.
> 
> This patch makes the computation of delayed runtime  the responsibility
> of the TimeDomain and introduces a ThrottledTimeDomain which computes
> the delayed runtime as realtime + delay.
> 
> This means timers will no longer run sooner than expected.  Under normal
> circumstancs this only timers whose delay modulo 1000ms is less than 100
> ms are less likely to be affected.  Timers whose whose delay modulo
> 1000ms is greater than 900 are highly likely to be affected (there's a
> good chance their delay was too small before).
> 
> BUG=587074
> 
> Review URL: https://codereview.chromium.org/1718233002
> 
> Cr-Commit-Position: refs/heads/master@{#376993}
> (cherry picked from commit b56bbe4ce3e7276a130a00d83cf00e5672cd6be1)
> 
> R=skyostil@chromium.org
> 
> Committed:
https://chromium.googlesource.com/chromium/src/+/fd563254490ae93382cb88a1e9a1...

TBR=skyostil@chromium.org,alexclarke@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=587074
==========

[commit-bot: I haz the power, 2016-02-26 23:49:23]

Committed patchset #1 (id:1)