Revert of Android: Free GLHelper context ashmem when it makes sense

Revert of Android: Free GLHelper context ashmem when it makes sense (patchset #4 id:60001 of https://codereview.chromium.org/2336043004/ )

Reason for revert:
Causes a null pointer crash. And also apparently doesn't work?

BUG=652050
Original issue's description:
> Android: Free GLHelper context ashmem when it makes sense
>
> Free the 'mapped_memory' that is used in readbacks through
> CopyFromCompositingSurface() when there is memory pressure
> in the system (or no activities are running and a readback
> completes).
>
> This memory gets lazily allocated during the first readback
> and it'd be the size of the texture after scaling. Freeing it
> is harmless at a slight reallocation cost when the next readback
> is triggered.
>
> BUG=641962
> TBR=boliu@chromium.org
>
> Committed: https://crrev.com/98f7c133cdef22c26922c56371f84989f7a2cd60
> Cr-Commit-Position: refs/heads/master@{#421357}

TBR=danakj@chromium.org,sievers@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=641962
Committed: https://crrev.com/4201167e8b04762db61cc037cc83537c298e2f53
Cr-Commit-Position: refs/heads/master@{#422574}

[boliu, 2016-10-03 21:42:36]

The CQ bit was checked by boliu@chromium.org

[boliu, 2016-10-03 21:42:37]

Created Revert of Android: Free GLHelper context ashmem when it makes sense

[commit-bot: I haz the power, 2016-10-03 21:43:53]

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, 2016-10-03 22:43:23]

Description was changed from

==========
Revert of Android: Free GLHelper context ashmem when it makes sense (patchset #4
id:60001 of https://codereview.chromium.org/2336043004/ )

Reason for revert:
Causes a null pointer crash. And also apparently doesn't work?

BUG=652050

Original issue's description:
> Android: Free GLHelper context ashmem when it makes sense
> 
> Free the 'mapped_memory' that is used in readbacks through
> CopyFromCompositingSurface() when there is memory pressure
> in the system (or no activities are running and a readback
> completes).
> 
> This memory gets lazily allocated during the first readback
> and it'd be the size of the texture after scaling. Freeing it
> is harmless at a slight reallocation cost when the next readback
> is triggered.
> 
> BUG=641962
> TBR=boliu@chromium.org
> 
> Committed: https://crrev.com/98f7c133cdef22c26922c56371f84989f7a2cd60
> Cr-Commit-Position: refs/heads/master@{#421357}

TBR=danakj@chromium.org,sievers@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=641962
==========

to

==========
Revert of Android: Free GLHelper context ashmem when it makes sense (patchset #4
id:60001 of https://codereview.chromium.org/2336043004/ )

Reason for revert:
Causes a null pointer crash. And also apparently doesn't work?

BUG=652050

Original issue's description:
> Android: Free GLHelper context ashmem when it makes sense
> 
> Free the 'mapped_memory' that is used in readbacks through
> CopyFromCompositingSurface() when there is memory pressure
> in the system (or no activities are running and a readback
> completes).
> 
> This memory gets lazily allocated during the first readback
> and it'd be the size of the texture after scaling. Freeing it
> is harmless at a slight reallocation cost when the next readback
> is triggered.
> 
> BUG=641962
> TBR=boliu@chromium.org
> 
> Committed: https://crrev.com/98f7c133cdef22c26922c56371f84989f7a2cd60
> Cr-Commit-Position: refs/heads/master@{#421357}

TBR=danakj@chromium.org,sievers@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=641962
==========

[commit-bot: I haz the power, 2016-10-03 22:43:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-03 22:45:45]

Description was changed from

==========
Revert of Android: Free GLHelper context ashmem when it makes sense (patchset #4
id:60001 of https://codereview.chromium.org/2336043004/ )

Reason for revert:
Causes a null pointer crash. And also apparently doesn't work?

BUG=652050

Original issue's description:
> Android: Free GLHelper context ashmem when it makes sense
> 
> Free the 'mapped_memory' that is used in readbacks through
> CopyFromCompositingSurface() when there is memory pressure
> in the system (or no activities are running and a readback
> completes).
> 
> This memory gets lazily allocated during the first readback
> and it'd be the size of the texture after scaling. Freeing it
> is harmless at a slight reallocation cost when the next readback
> is triggered.
> 
> BUG=641962
> TBR=boliu@chromium.org
> 
> Committed: https://crrev.com/98f7c133cdef22c26922c56371f84989f7a2cd60
> Cr-Commit-Position: refs/heads/master@{#421357}

TBR=danakj@chromium.org,sievers@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=641962
==========

to

==========
Revert of Android: Free GLHelper context ashmem when it makes sense (patchset #4
id:60001 of https://codereview.chromium.org/2336043004/ )

Reason for revert:
Causes a null pointer crash. And also apparently doesn't work?

BUG=652050

Original issue's description:
> Android: Free GLHelper context ashmem when it makes sense
>
> Free the 'mapped_memory' that is used in readbacks through
> CopyFromCompositingSurface() when there is memory pressure
> in the system (or no activities are running and a readback
> completes).
>
> This memory gets lazily allocated during the first readback
> and it'd be the size of the texture after scaling. Freeing it
> is harmless at a slight reallocation cost when the next readback
> is triggered.
>
> BUG=641962
> TBR=boliu@chromium.org
>
> Committed: https://crrev.com/98f7c133cdef22c26922c56371f84989f7a2cd60
> Cr-Commit-Position: refs/heads/master@{#421357}

TBR=danakj@chromium.org,sievers@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=641962

Committed: https://crrev.com/4201167e8b04762db61cc037cc83537c298e2f53
Cr-Commit-Position: refs/heads/master@{#422574}
==========

[commit-bot: I haz the power, 2016-10-03 22:45:46]

Patchset 1 (id:??) landed as
https://crrev.com/4201167e8b04762db61cc037cc83537c298e2f53
Cr-Commit-Position: refs/heads/master@{#422574}