Remove unnamed namespace usage from 'gm'.

Remove unnamed namespace usage from 'gm'.

Skia prefers static over unnamed namespaces.

BUG=None
TEST=None
R=bsalomon@google.com,robertphillips@google.com

Committed: http://code.google.com/p/skia/source/detail?r=12326

[tfarina, 2013-11-20 19:19:47]

trivial cleanup...

[robertphillips, 2013-11-20 19:30:49]

lgtm

[commit-bot: I haz the power, 2013-11-20 19:36:18]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/tfarina@chromium.org/79173002/1

[commit-bot: I haz the power, 2013-11-20 21:32:22]

Change committed as 12326