Deflake css3/filter/effect layout tests

Deflake css3/filter/effect layout tests

https://codereview.chromium.org/1960543002 introduced some flakiness in
these tests, which appears to be due to texture sampling flakiness in
Mesa.  One workaround for this is to resize the bitmap in the tests to
be 256x128.  Because the tile (and the tile draw quad) will use this
size directly (instead of rounding up to some other size), the tile
and the render pass share the same size and are nice round numbers,
so texture sampling should have no errors.

BUG=621892
Committed: https://crrev.com/3950059021388215d3864e552c7da761d4c3f822
Cr-Commit-Position: refs/heads/master@{#418428}

[enne (OOO), 2016-09-02 18:19:40]

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

[commit-bot: I haz the power, 2016-09-02 18:20:32]

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

[enne (OOO), 2016-09-02 18:21:48]

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

[enne (OOO), 2016-09-02 18:22:10]

enne@chromium.org changed reviewers:
+ pdr@chromium.org, senorblanco@chromium.org

[commit-bot: I haz the power, 2016-09-02 18:22:23]

Dry run: 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, 2016-09-02 19:08:35]

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

[commit-bot: I haz the power, 2016-09-02 19:08:36]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[enne (OOO), 2016-09-02 21:36:58]

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

[enne (OOO), 2016-09-02 21:37:36]

PTAL

[enne (OOO), 2016-09-02 21:37:37]

PTAL

[commit-bot: I haz the power, 2016-09-02 21:37:41]

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

[pdr., 2016-09-02 21:59:14]

On 2016/09/02 at 21:37:37, enne wrote:
> PTAL

Kinda unfortunate but I don't see a better way around this. Can you please add
comments in the layouttests to explain this, as a way of maximizing the chance
that others understand the issue?

[enne (OOO), 2016-09-02 22:06:41]

On 2016/09/02 at 21:59:14, pdr wrote:
> On 2016/09/02 at 21:37:37, enne wrote:
> > PTAL
> 
> Kinda unfortunate but I don't see a better way around this. Can you please add
comments in the layouttests to explain this, as a way of maximizing the chance
that others understand the issue?

Done.

[pdr., 2016-09-02 22:19:45]

On 2016/09/02 at 22:06:41, enne wrote:
> On 2016/09/02 at 21:59:14, pdr wrote:
> > On 2016/09/02 at 21:37:37, enne wrote:
> > > PTAL
> > 
> > Kinda unfortunate but I don't see a better way around this. Can you please
add comments in the layouttests to explain this, as a way of maximizing the
chance that others understand the issue?
> 
> Done.

LGTM here, but please wait for senorblanco to review as well.

[enne (OOO), 2016-09-12 20:28:00]

On 2016/09/02 at 22:19:45, pdr wrote:

> LGTM here, but please wait for senorblanco to review as well.

senorblanco: wdyt?

[Stephen White, 2016-09-13 17:56:23]

LGTM

[enne (OOO), 2016-09-13 17:57:27]

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

[commit-bot: I haz the power, 2016-09-13 17:57:58]

Dry run: 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, 2016-09-13 18:37:32]

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

[commit-bot: I haz the power, 2016-09-13 18:37:34]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[enne (OOO), 2016-09-13 22:49:15]

The CQ bit was checked by enne@chromium.org

[commit-bot: I haz the power, 2016-09-13 22:49:49]

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, 2016-09-14 00:11:57]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2016-09-14 00:14:39]

Description was changed from

==========
Deflake css3/filter/effect layout tests

https://codereview.chromium.org/1960543002 introduced some flakiness in
these tests, which appears to be due to texture sampling flakiness in
Mesa.  One workaround for this is to resize the bitmap in the tests to
be 256x128.  Because the tile (and the tile draw quad) will use this
size directly (instead of rounding up to some other size), the tile
and the render pass share the same size and are nice round numbers,
so texture sampling should have no errors.

BUG=621892
==========

to

==========
Deflake css3/filter/effect layout tests

https://codereview.chromium.org/1960543002 introduced some flakiness in
these tests, which appears to be due to texture sampling flakiness in
Mesa.  One workaround for this is to resize the bitmap in the tests to
be 256x128.  Because the tile (and the tile draw quad) will use this
size directly (instead of rounding up to some other size), the tile
and the render pass share the same size and are nice round numbers,
so texture sampling should have no errors.

BUG=621892

Committed: https://crrev.com/3950059021388215d3864e552c7da761d4c3f822
Cr-Commit-Position: refs/heads/master@{#418428}
==========

[commit-bot: I haz the power, 2016-09-14 00:14:41]

Patchset 4 (id:??) landed as
https://crrev.com/3950059021388215d3864e552c7da761d4c3f822
Cr-Commit-Position: refs/heads/master@{#418428}