Stop using GrTexture::get/setCustomData in Canvas2DLayerBridge

Stop using GrTexture::get/setCustomData in Canvas2DLayerBridge

Canvas2DLayerBridge was using custom data to cache mailbox names
associated with recycled textures managed by skia.  This helped
prevent leaking mailboxes.  This CL uses a different approach
that consists in disassociating mailboxes to prevent the mailbox
leak.  The goal is to allow the skia team to proceed with the
deprecation of texture custom data attachments.

BUG=632722
Committed: https://crrev.com/645b3cc4697033ab68738dc68d9dfd8db200c008
Cr-Commit-Position: refs/heads/master@{#413129}

[Justin Novosad, 2016-08-18 22:06:39]

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

[commit-bot: I haz the power, 2016-08-18 22:07:53]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Justin Novosad, 2016-08-18 22:08:07]

junov@chromium.org changed reviewers:
+ piman@chromium.org

[Justin Novosad, 2016-08-18 22:08:08]

PTAL

[piman, 2016-08-18 22:23:15]

lgtm

[commit-bot: I haz the power, 2016-08-19 00:35:57]

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

[commit-bot: I haz the power, 2016-08-19 00:35:58]

Dry run: This issue passed the CQ dry run.

[Justin Novosad, 2016-08-19 13:54:47]

The CQ bit was checked by junov@chromium.org

[commit-bot: I haz the power, 2016-08-19 13:55:03]

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, 2016-08-19 13:58:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-19 14:02:38]

Description was changed from

==========
Stop using GrTexture::get/setCustomData in Canvas2DLayerBridge

Canvas2DLayerBridge was using custom data to cache mailbox names
associated with recycled textures managed by skia.  This helped
prevent leaking mailboxes.  This CL uses a different approach
that consists in disassociating mailboxes to prevent the mailbox
leak.  The goal is to allow the skia team to proceed with the
deprecation of texture custom data attachments.

BUG=632722
==========

to

==========
Stop using GrTexture::get/setCustomData in Canvas2DLayerBridge

Canvas2DLayerBridge was using custom data to cache mailbox names
associated with recycled textures managed by skia.  This helped
prevent leaking mailboxes.  This CL uses a different approach
that consists in disassociating mailboxes to prevent the mailbox
leak.  The goal is to allow the skia team to proceed with the
deprecation of texture custom data attachments.

BUG=632722

Committed: https://crrev.com/645b3cc4697033ab68738dc68d9dfd8db200c008
Cr-Commit-Position: refs/heads/master@{#413129}
==========

[commit-bot: I haz the power, 2016-08-19 14:02:39]

Patchset 1 (id:??) landed as
https://crrev.com/645b3cc4697033ab68738dc68d9dfd8db200c008
Cr-Commit-Position: refs/heads/master@{#413129}