make gm background colors 565 compatible

make gm background colors 565 compatible

Change a batch of GM tests to convert their background color
so that it is representable in 8888 and 565.

Enable portable text in those same tests to minimize platform
differences.

In a couple of bitmap tests, use portable typefaces instead of
choosing 'Times' which may or may not be available on the platform.

R=borenet@google.com

Committed: https://skia.googlesource.com/skia/+/be7f768a357aefb39c42d24b81b24d647bb6ab70

[caryclark, 2015-06-15 11:31:06]

The CQ bit was checked by caryclark@google.com

[commit-bot: I haz the power, 2015-06-15 11:31:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1176243006/1

[commit-bot: I haz the power, 2015-06-15 11:31:13]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2015-06-15 17:31 UTC

[commit-bot: I haz the power, 2015-06-15 11:32:23]

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

[commit-bot: I haz the power, 2015-06-15 11:32:24]

Try jobs failed on following builders:
  Build-Ubuntu-Clang-x86_64-Debug-Trybot on client.skia.compile (JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-Clang-x...)

[caryclark, 2015-06-15 11:48:22]

The CQ bit was checked by caryclark@google.com

[commit-bot: I haz the power, 2015-06-15 11:48:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1176243006/20001

[borenet, 2015-06-15 12:09:03]

LGTM. I assume this will trigger a lot of new images?

[commit-bot: I haz the power, 2015-06-15 12:10:05]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/be7f768a357aefb39c42d24b81b24d647bb6ab70

[caryclark, 2015-06-15 12:27:35]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/1184123002/ by caryclark@google.com.

The reason for reverting is: breaks many bots with refcnt error.