Add test cases for Clamp and Repeat tiles.

Rework files and add test cases.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1757193002

Committed: https://skia.googlesource.com/skia/+/c60fee0f15c73137c4e335de04e9ca06e131b110

[herb_g, 2016-03-03 02:40:01]

Description was changed from

==========
Rework files and add test cases.

BUG=skia:
==========

to

==========
Rework files and add test cases.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[herb_g, 2016-03-03 03:02:59]

Repeat tiler working with dx = 1

[herb_g, 2016-03-03 19:58:04]

Dubious comments.

[herb_g, 2016-03-03 22:27:54]

Working test

[herb_g, 2016-03-03 22:29:57]

Description was changed from

==========
Rework files and add test cases.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Rework files and add test cases.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[herb_g, 2016-03-03 22:29:57]

herb@google.com changed reviewers:
+ mtklein@google.com, reed@google.com

[mtklein, 2016-03-04 13:33:26]

let's split the bug fixes from the refactor.  hard to follow together.

[herb_g, 2016-03-04 19:41:38]

Add tests for the tile spans.

[herb_g, 2016-03-04 19:46:23]

The file splitting part of this CL is checked in. Here are the test cases and
fixes to Clamp and Repeat.

[herb_g, 2016-03-04 19:46:39]

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

[commit-bot: I haz the power, 2016-03-04 19:46:48]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1757193002/80001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1757193002/80001

[commit-bot: I haz the power, 2016-03-04 19:50:13]

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

[commit-bot: I haz the power, 2016-03-04 19:50:13]

Dry run: Try jobs failed on following builders:
  Build-Win-MSVC-x86_64-Debug-Trybot on client.skia.compile (JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Win-MSVC-x86_6...)

[herb_g, 2016-03-04 21:36:40]

Compiler issues 1

[herb_g, 2016-03-04 21:37:04]

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

[commit-bot: I haz the power, 2016-03-04 21:37:14]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1757193002/100001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1757193002/100001

[commit-bot: I haz the power, 2016-03-04 22:04:25]

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

[commit-bot: I haz the power, 2016-03-04 22:04:30]

Dry run: This issue passed the CQ dry run.

[herb_g, 2016-03-04 22:07:38]

Passing CQ tests. PTAL

[herb_g, 2016-03-05 23:43:54]

Simplify span breakAt usage, by making breakAt consistant for +/- dx.

[herb_g, 2016-03-05 23:44:30]

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

[commit-bot: I haz the power, 2016-03-05 23:44:39]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1757193002/120001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1757193002/120001

[herb_g, 2016-03-05 23:45:59]

Making breakAt consistent for +/- dx simplified all the -1 nonsense at the call
sites. The code should be simpler now.

[commit-bot: I haz the power, 2016-03-05 23:53:49]

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

[commit-bot: I haz the power, 2016-03-05 23:53:50]

Dry run: This issue passed the CQ dry run.

[mtklein_C, 2016-03-07 16:38:05]

mtklein@chromium.org changed reviewers:
+ mtklein@chromium.org

[mtklein_C, 2016-03-07 16:38:06]

lgtm

[herb_g, 2016-03-07 16:52:48]

The CQ bit was checked by herb@google.com

[commit-bot: I haz the power, 2016-03-07 16:52:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1757193002/120001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1757193002/120001

[commit-bot: I haz the power, 2016-03-07 17:17:49]

Description was changed from

==========
Rework files and add test cases.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Rework files and add test cases.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/c60fee0f15c73137c4e335de04e9ca06e131b110
==========

[commit-bot: I haz the power, 2016-03-07 17:17:50]

Committed patchset #7 (id:120001) as
https://skia.googlesource.com/skia/+/c60fee0f15c73137c4e335de04e9ca06e131b110