Revert of Reduce ActiveDOMObjects from core/

Revert of Reduce ActiveDOMObjects from core/ (patchset #4 id:60001 of https://codereview.chromium.org/1750453002/ )

Reason for revert:
Revert requested by Ligi Vinod and amineer

Original issue's description:
> Reduce ActiveDOMObjects from core/
> 
> Per the plan described in https://groups.google.com/a/chromium.org/d/topic/blink-dev/UwRGJgLBElo/discussion,
> this CL replaces a bunch of ActiveDOMObjects in core/ with ContextLifecycleObservers.
> 
> No change in behavior.
> 
> BUG=589507
> 
> Committed: https://crrev.com/fe7d013fb54ea6a85751043d439930fa85b0c51b
> Cr-Commit-Position: refs/heads/master@{#378191}

TBR=sigbjornf@opera.com,haraken@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=589507, 591982

[dewittj, 2016-03-15 23:26:51]

Created Revert of Reduce ActiveDOMObjects from core/

[commit-bot: I haz the power, 2016-03-15 23:27:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1808533003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1808533003/1

[dewittj, 2016-03-15 23:27:45]

The CQ bit was unchecked by dewittj@chromium.org

[dewittj, 2016-03-15 23:30:04]

The CQ bit was checked by dewittj@chromium.org

[dewittj, 2016-03-15 23:30:44]

Description was changed from

==========
Revert of Reduce ActiveDOMObjects from core/ (patchset #4 id:60001 of
https://codereview.chromium.org/1750453002/ )

Reason for revert:
Revert requested by Ligi Vinod and amineer

Original issue's description:
> Reduce ActiveDOMObjects from core/
> 
> Per the plan described in
https://groups.google.com/a/chromium.org/d/topic/blink-dev/UwRGJgLBElo/discus...,
> this CL replaces a bunch of ActiveDOMObjects in core/ with
ContextLifecycleObservers.
> 
> No change in behavior.
> 
> BUG=589507
> 
> Committed: https://crrev.com/fe7d013fb54ea6a85751043d439930fa85b0c51b
> Cr-Commit-Position: refs/heads/master@{#378191}

TBR=sigbjornf@opera.com,haraken@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=589507
==========

to

==========
Revert of Reduce ActiveDOMObjects from core/ (patchset #4 id:60001 of
https://codereview.chromium.org/1750453002/ )

Reason for revert:
Revert requested by Ligi Vinod and amineer

Original issue's description:
> Reduce ActiveDOMObjects from core/
> 
> Per the plan described in
https://groups.google.com/a/chromium.org/d/topic/blink-dev/UwRGJgLBElo/discus...,
> this CL replaces a bunch of ActiveDOMObjects in core/ with
ContextLifecycleObservers.
> 
> No change in behavior.
> 
> BUG=589507
> 
> Committed: https://crrev.com/fe7d013fb54ea6a85751043d439930fa85b0c51b
> Cr-Commit-Position: refs/heads/master@{#378191}

TBR=sigbjornf@opera.com,haraken@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=589507,591982
==========

[commit-bot: I haz the power, 2016-03-15 23:30:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1808533003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1808533003/1

[commit-bot: I haz the power, 2016-03-15 23:33:50]

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

[commit-bot: I haz the power, 2016-03-15 23:33:51]

Try jobs failed on following builders:
  linux_chromium_compile_dbg_32_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  ios_dbg_simulator_gn on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)
  ios_dbg_simulator_ninja on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)
  ios_rel_device_gn on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_gn...)
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[haraken, 2016-03-16 07:06:35]

LGTM, but we need to resolve merge conflicts manually.