Add testing flag for XPS for deterministic ids.

Add testing flag for XPS for deterministic ids.

BUG=skia:455
R=mtklein@google.com

Committed: https://skia.googlesource.com/skia/+/da5a1b8

[bungeman-skia, 2014-08-22 18:18:43]

This is a first step, wanted to get this in an working. The next step (so I can
close this old bug) is to have out tools set the flag to get deterministic ids.

I have not yet determined whether or not we can just always use deterministic
ids. XPS really wants GUIDs, and these somewhat violate the contract of GUIDs.

[mtklein, 2014-08-22 18:23:34]

lgtm

https://codereview.chromium.org/494423002/diff/1/include/device/xps/SkXPSDevi...
File include/device/xps/SkXPSDevice.h (right):

https://codereview.chromium.org/494423002/diff/1/include/device/xps/SkXPSDevi...
include/device/xps/SkXPSDevice.h:186: decltype(GUID::Data1) fNextId = 0;
Would prefer DWORD, whatever explicitly.

[bungeman-skia, 2014-08-22 19:01:28]

The CQ bit was checked by bungeman@google.com

[commit-bot: I haz the power, 2014-08-22 19:02:16]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/bungeman@google.com/494423002/1

[commit-bot: I haz the power, 2014-08-22 19:02:18]

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

[commit-bot: I haz the power, 2014-08-22 19:02:19]

Presubmit check for 494423002-1 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit ERRORS **
Since the CL is editing public API, you must have an LGTM from one of:
('reed@chromium.org', 'reed@google.com', 'bsalomon@chromium.org',
'bsalomon@google.com', 'djsollen@chromium.org', 'djsollen@google.com')

[bungeman-skia, 2014-08-22 19:07:37]

Committed patchset #1 manually as da5a1b8.