[on-hold][subresource_filter] Add ActivationTracker to track all activated contents

[subresource_filter] Add ActivationTracker to track all activated contents

This allows us to determine if a given site is activated in the current profile,
taking into account all of the WebContents that the profile is hosting.

This will be used to hook into preferences, which are mostly scoped on a
per-profile basis.

BUG=todo

[Charlie Harrison, 2017-04-25 04:04:15]

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

[commit-bot: I haz the power, 2017-04-25 04:04:47]

Dry run: CQ is trying da patch.

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

[Charlie Harrison, 2017-04-25 04:06:06]

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

[commit-bot: I haz the power, 2017-04-25 04:06:31]

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, 2017-04-25 04:16:24]

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

[commit-bot: I haz the power, 2017-04-25 04:16:25]

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

[Charlie Harrison, 2017-04-25 14:44:38]

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

[commit-bot: I haz the power, 2017-04-25 14:44:56]

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, 2017-04-25 15:37:53]

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

[commit-bot: I haz the power, 2017-04-25 15:37:54]

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

[Charlie Harrison, 2017-04-27 04:06:01]

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

[commit-bot: I haz the power, 2017-04-27 04:06:53]

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, 2017-04-27 06:27:35]

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

[commit-bot: I haz the power, 2017-04-27 06:27:36]

Dry run: This issue passed the CQ dry run.

[Charlie Harrison, 2017-04-30 13:15:22]

Description was changed from

==========
[subresource_filter] Add ActivationTracker to track all activated contents

BUG=todo
==========

to

==========
[subresource_filter] Add ActivationTracker to track all activated contents

This allows us to determine if a given site is activated in the current profile,
taking into account all of the WebContents that the profile is hosting.

This will be used to hook into preferences, which are mostly scoped on a
per-profile basis.

BUG=todo
==========

[Charlie Harrison, 2017-04-30 13:16:53]

csharrison@chromium.org changed reviewers:
+ shivanisha@chromium.org

[Charlie Harrison, 2017-04-30 13:16:55]

shivanisha: could you take a first look?

[Charlie Harrison, 2017-05-01 04:08:51]

Actually, hold off the requirements may be changing.