Cap color index values

Cap color index values

In the provided example the color table has 10 entries but some of the pixels in the bitmap overflow. This CL goes through the pixel values and caps them to the max index.

An alternate approach would be to just have the color table always have 256 entries but zero out the unused ones.

BUG=492265
Committed: https://skia.googlesource.com/skia/+/28937843f49b3015e9f4c04e04eb2604c3f873cf

[robertphillips, 2015-06-05 15:31:21]

robertphillips@google.com changed reviewers:
+ reed@google.com

[reed1, 2015-06-08 13:14:47]

lgtm

[robertphillips, 2015-06-08 13:19:37]

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

[commit-bot: I haz the power, 2015-06-08 13:19:45]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1165493003/1

[commit-bot: I haz the power, 2015-06-08 13:25:56]

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

[commit-bot: I haz the power, 2015-06-08 13:25:57]

Dry run: This issue passed the CQ dry run.

[robertphillips, 2015-06-08 14:10:14]

The CQ bit was checked by robertphillips@google.com

[commit-bot: I haz the power, 2015-06-08 14:10:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1165493003/1

[commit-bot: I haz the power, 2015-06-08 14:10:53]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/28937843f49b3015e9f4c04e04eb2604c3f873cf