Clean up GrBatchAtlas a bit

Clean up GrBatchAtlas a bit

The main thrust of this CL is to remove knowledge of the atlas' backing texture from the BatchPlot. It also reduces the API surface of the BatchPlot and shrinks the amount of fields in the BatchAtlas.

Committed: https://skia.googlesource.com/skia/+/2b0536f37aa8915b6f58dae0b88b18023cb04d17

[robertphillips, 2015-11-05 18:56:08]

Description was changed from

==========
Clean up GrBatchAtlas a bit
==========

to

==========
Clean up GrBatchAtlas a bit

The main thrust of this CL is to remove knowledge of the atlas' backing texture
from the BatchPlot. It also reduces the API surface of the BatchPlot and shrinks
the amount of fields in the BatchAtlas.
==========

[robertphillips, 2015-11-05 18:56:08]

robertphillips@google.com changed reviewers:
+ joshualitt@chromium.org

[joshualitt, 2015-11-05 19:28:56]

On 2015/11/05 19:02:38, robertphillips wrote:

lgtm

[robertphillips, 2015-11-05 20:56:56]

The CQ bit was checked by robertphillips@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-11-05 20:57:01]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1413403009/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1413403009/20001

[commit-bot: I haz the power, 2015-11-05 20:57:59]

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

[commit-bot: I haz the power, 2015-11-05 20:57:59]

Dry run: Try jobs failed on following builders:
  Build-Ubuntu-GCC-Arm64-Debug-Android-Trybot on client.skia.compile
(JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-GCC-Arm...)
  Build-Ubuntu-GCC-Arm7-Debug-Android-Trybot on client.skia.compile (JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-GCC-Arm...)

[robertphillips, 2015-11-06 17:49:00]

The CQ bit was checked by robertphillips@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-11-06 17:49:03]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1413403009/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1413403009/40001

[commit-bot: I haz the power, 2015-11-06 17:49:42]

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

[commit-bot: I haz the power, 2015-11-06 17:49:43]

Dry run: Try jobs failed on following builders:
  Build-Ubuntu-GCC-Mips-Debug-Android-Trybot on client.skia.compile (JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-GCC-Mip...)

[robertphillips, 2015-11-06 19:07:52]

The CQ bit was checked by robertphillips@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-11-06 19:08:01]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1413403009/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1413403009/60001

[commit-bot: I haz the power, 2015-11-06 19:19:52]

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

[commit-bot: I haz the power, 2015-11-06 19:19:53]

Dry run: This issue passed the CQ dry run.

[robertphillips, 2015-11-06 19:42:41]

The CQ bit was checked by robertphillips@google.com

[robertphillips, 2015-11-06 19:42:42]

The patchset sent to the CQ was uploaded after l-g-t-m from
joshualitt@google.com
Link to the patchset: https://codereview.chromium.org/1413403009/#ps60001
(title: "Fix bpp size")

[commit-bot: I haz the power, 2015-11-06 20:19:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1413403009/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1413403009/60001

[commit-bot: I haz the power, 2015-11-06 22:10:47]

Committed patchset #4 (id:60001) as
https://skia.googlesource.com/skia/+/2b0536f37aa8915b6f58dae0b88b18023cb04d17