cc: Always use invalidation on the pending tree when deciding to share

cc: Always use invalidation on the pending tree when deciding to share

The invalidation on the active tree shouldn't prevent new tiles on the
active tree from sharing with the pending tree. Instead, the
invalidation on the pending tree should.

The current code can lead to us re-rastering content for no reason on
the active tree, when it is already available on the pending tree. Or
sharing with the pending tree when it's not appropriate causing a
non-atomic frame update during scrolling with pending tree content
appearing on the active tree too soon.

R=enne, vmpstr
BUG=387116
Committed: https://crrev.com/82e46120237bc023559ac7ebddb29e21b6530170
Cr-Commit-Position: refs/heads/master@{#301193}

Committed: https://crrev.com/10f4b33a87375fc1becabf30d82a005b8d13158c
Cr-Commit-Position: refs/heads/master@{#301391}

[danakj, 2014-10-24 20:07:50]

Without new ForTesting method now

[enne (OOO), 2014-10-24 20:18:41]

lgtm

[danakj, 2014-10-24 20:18:52]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-10-24 20:20:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/678773002/60001

[commit-bot: I haz the power, 2014-10-24 21:30:24]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2014-10-24 21:31:02]

Patchset 4 (id:??) landed as
https://crrev.com/82e46120237bc023559ac7ebddb29e21b6530170
Cr-Commit-Position: refs/heads/master@{#301193}

[danakj, 2014-10-27 14:38:06]

The CQ bit was checked by danakj@chromium.org

[danakj, 2014-10-27 14:38:10]

This got reverted in order to revert https://codereview.chromium.org/676953003/

So I've rebased this and relanding it.

[commit-bot: I haz the power, 2014-10-27 14:38:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/678773002/80001

[commit-bot: I haz the power, 2014-10-27 15:22:44]

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

[commit-bot: I haz the power, 2014-10-27 15:22:45]

Try jobs failed on following builders:
  mac_chromium_rel on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel/...)

[danakj, 2014-10-27 15:39:28]

The CQ bit was checked by danakj@chromium.org

[danakj, 2014-10-27 15:39:37]

The CQ bit was unchecked by danakj@chromium.org

[danakj, 2014-10-27 16:47:03]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-10-27 16:49:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/678773002/100001

[commit-bot: I haz the power, 2014-10-27 17:00:09]

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

[commit-bot: I haz the power, 2014-10-27 17:00:10]

Try jobs failed on following builders:
  win_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu/builds/78933)

[danakj, 2014-10-27 17:01:39]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-10-27 17:03:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/678773002/100001

[commit-bot: I haz the power, 2014-10-27 17:57:24]

Committed patchset #6 (id:100001)

[commit-bot: I haz the power, 2014-10-27 17:58:12]

Patchset 6 (id:??) landed as
https://crrev.com/10f4b33a87375fc1becabf30d82a005b8d13158c
Cr-Commit-Position: refs/heads/master@{#301391}