Reland of cc : Make LayerImpl destruction independent of tree hierarchy

Reland of cc : Make LayerImpl destruction independent of tree hierarchy (patchset #1 id:1 of https://codereview.chromium.org/2054483002/ )

Reason for revert:
Didn't fix anything

Original issue's description:
> Revert of cc : Make LayerImpl destruction independent of tree hierarchy (patchset #2 id:20001 of https://codereview.chromium.org/2043963005/ )
>
> Reason for revert:
> Tentative revert for strange linker failures:
>
> https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac%20Builder%20%28dbg%29/builds/156821
>
> I already tried reverting the other CL in the blame list (mine) with no success. Doesn't make sense that this CL would cause it either, but just ruling it out. I'll revert the revert if the builder stays red.
>
> Original issue's description:
> > cc : Make LayerImpl destruction independent of tree hierarchy
> >
> > Instead of deleting all layers when the root is deleted, we delete
> > all layers when the layer tree impl is shutdown.
> >
> > BUG=617791
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/e536d2292fa548ee6231ff23ac65203c261e4a14
> > Cr-Commit-Position: refs/heads/master@{#398606}
>
> TBR=ajuma@chromium.org,weiliangc@chromium.org,jaydasika@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=617791
>
> Committed: https://crrev.com/f3a9e5397cce794930f73f6c6a43c0621ecf06a6
> Cr-Commit-Position: refs/heads/master@{#398623}

TBR=ajuma@chromium.org,weiliangc@chromium.org,jaydasika@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=617791
Committed: https://crrev.com/01cf254d590c4d82dd12ea8bd9a54d71bc9281a9
Cr-Commit-Position: refs/heads/master@{#398632}

[Ken Rockot(use gerrit already), 2016-06-08 19:06:53]

The CQ bit was checked by rockot@chromium.org

[Ken Rockot(use gerrit already), 2016-06-08 19:06:53]

Created Reland of cc : Make LayerImpl destruction independent of tree hierarchy

[commit-bot: I haz the power, 2016-06-08 19:07:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2048863003/1

[commit-bot: I haz the power, 2016-06-08 19:08:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-08 19:11:21]

Description was changed from

==========
Reland of cc : Make LayerImpl destruction independent of tree hierarchy
(patchset #1 id:1 of https://codereview.chromium.org/2054483002/ )

Reason for revert:
Didn't fix anything

Original issue's description:
> Revert of cc : Make LayerImpl destruction independent of tree hierarchy
(patchset #2 id:20001 of https://codereview.chromium.org/2043963005/ )
> 
> Reason for revert:
> Tentative revert for strange linker failures:
> 
>
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac%20Builder%...
> 
> I already tried reverting the other CL in the blame list (mine) with no
success. Doesn't make sense that this CL would cause it either, but just ruling
it out. I'll revert the revert if the builder stays red.
> 
> Original issue's description:
> > cc : Make LayerImpl destruction independent of tree hierarchy
> >
> > Instead of deleting all layers when the root is deleted, we delete
> > all layers when the layer tree impl is shutdown.
> >
> > BUG=617791
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/e536d2292fa548ee6231ff23ac65203c261e4a14
> > Cr-Commit-Position: refs/heads/master@{#398606}
> 
> TBR=ajuma@chromium.org,weiliangc@chromium.org,jaydasika@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=617791
> 
> Committed: https://crrev.com/f3a9e5397cce794930f73f6c6a43c0621ecf06a6
> Cr-Commit-Position: refs/heads/master@{#398623}

TBR=ajuma@chromium.org,weiliangc@chromium.org,jaydasika@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=617791
==========

to

==========
Reland of cc : Make LayerImpl destruction independent of tree hierarchy
(patchset #1 id:1 of https://codereview.chromium.org/2054483002/ )

Reason for revert:
Didn't fix anything

Original issue's description:
> Revert of cc : Make LayerImpl destruction independent of tree hierarchy
(patchset #2 id:20001 of https://codereview.chromium.org/2043963005/ )
>
> Reason for revert:
> Tentative revert for strange linker failures:
>
>
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac%20Builder%...
>
> I already tried reverting the other CL in the blame list (mine) with no
success. Doesn't make sense that this CL would cause it either, but just ruling
it out. I'll revert the revert if the builder stays red.
>
> Original issue's description:
> > cc : Make LayerImpl destruction independent of tree hierarchy
> >
> > Instead of deleting all layers when the root is deleted, we delete
> > all layers when the layer tree impl is shutdown.
> >
> > BUG=617791
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/e536d2292fa548ee6231ff23ac65203c261e4a14
> > Cr-Commit-Position: refs/heads/master@{#398606}
>
> TBR=ajuma@chromium.org,weiliangc@chromium.org,jaydasika@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=617791
>
> Committed: https://crrev.com/f3a9e5397cce794930f73f6c6a43c0621ecf06a6
> Cr-Commit-Position: refs/heads/master@{#398623}

TBR=ajuma@chromium.org,weiliangc@chromium.org,jaydasika@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=617791

Committed: https://crrev.com/01cf254d590c4d82dd12ea8bd9a54d71bc9281a9
Cr-Commit-Position: refs/heads/master@{#398632}
==========

[commit-bot: I haz the power, 2016-06-08 19:11:24]

Patchset 1 (id:??) landed as
https://crrev.com/01cf254d590c4d82dd12ea8bd9a54d71bc9281a9
Cr-Commit-Position: refs/heads/master@{#398632}