Revert of CompositorViewHolder is source of truth for viewports

Revert of CompositorViewHolder is source of truth for viewports (patchset #5 id:80001 of https://codereview.chromium.org/2509873003/ )

Reason for revert:
Broke the builder: https://build.chromium.org/p/chromium.android/builders/Android%20arm64%20Builder%20%28dbg%29/builds/11030

Original issue's description:
> CompositorViewHolder is source of truth for viewports
>
> This change makes the CompositorViewHolder responsible for knowing
> what the window and visible viewports are. Any class that needs to
> know this information can pull it from the CompositorViewHolder
> (a LayoutManagerHost) instead of having it pushed or caching it.
> This removes a fair amount of state and complication in
> LayoutManager.
>
> BUG=662427
>
> Committed: https://crrev.com/fd6719290c9dce87292ea653ac370542014030c7
> Cr-Commit-Position: refs/heads/master@{#433916}

TBR=aelias@chromium.org,dtrainor@chromium.org,mdjones@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=662427
Committed: https://crrev.com/af2850cc8821a3fec3fa6608b0aeed88a8eb947e
Cr-Commit-Position: refs/heads/master@{#433937}

[Maria, 2016-11-22 19:10:55]

The CQ bit was checked by mariakhomenko@chromium.org

[Maria, 2016-11-22 19:10:55]

Created Revert of CompositorViewHolder is source of truth for viewports

[commit-bot: I haz the power, 2016-11-22 19:11:28]

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, 2016-11-22 19:12:11]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1479841855112960, "parent_rev":
"55955c72fd88b8c0a4d44d9313c2aa61523bcd1d", "commit_rev":
"e0ba65a60aa323a430ae18b72bc1b4ad10b3b057"}

[commit-bot: I haz the power, 2016-11-22 19:12:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-22 19:16:27]

Description was changed from

==========
Revert of CompositorViewHolder is source of truth for viewports (patchset #5
id:80001 of https://codereview.chromium.org/2509873003/ )

Reason for revert:
Broke the builder:
https://build.chromium.org/p/chromium.android/builders/Android%20arm64%20Buil...

Original issue's description:
> CompositorViewHolder is source of truth for viewports
> 
> This change makes the CompositorViewHolder responsible for knowing
> what the window and visible viewports are. Any class that needs to
> know this information can pull it from the CompositorViewHolder
> (a LayoutManagerHost) instead of having it pushed or caching it.
> This removes a fair amount of state and complication in
> LayoutManager.
> 
> BUG=662427
> 
> Committed: https://crrev.com/fd6719290c9dce87292ea653ac370542014030c7
> Cr-Commit-Position: refs/heads/master@{#433916}

TBR=aelias@chromium.org,dtrainor@chromium.org,mdjones@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=662427
==========

to

==========
Revert of CompositorViewHolder is source of truth for viewports (patchset #5
id:80001 of https://codereview.chromium.org/2509873003/ )

Reason for revert:
Broke the builder:
https://build.chromium.org/p/chromium.android/builders/Android%20arm64%20Buil...

Original issue's description:
> CompositorViewHolder is source of truth for viewports
>
> This change makes the CompositorViewHolder responsible for knowing
> what the window and visible viewports are. Any class that needs to
> know this information can pull it from the CompositorViewHolder
> (a LayoutManagerHost) instead of having it pushed or caching it.
> This removes a fair amount of state and complication in
> LayoutManager.
>
> BUG=662427
>
> Committed: https://crrev.com/fd6719290c9dce87292ea653ac370542014030c7
> Cr-Commit-Position: refs/heads/master@{#433916}

TBR=aelias@chromium.org,dtrainor@chromium.org,mdjones@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=662427

Committed: https://crrev.com/af2850cc8821a3fec3fa6608b0aeed88a8eb947e
Cr-Commit-Position: refs/heads/master@{#433937}
==========

[commit-bot: I haz the power, 2016-11-22 19:16:27]

Patchset 1 (id:??) landed as
https://crrev.com/af2850cc8821a3fec3fa6608b0aeed88a8eb947e
Cr-Commit-Position: refs/heads/master@{#433937}