Remove unnamed namespace usage from tests/

Skia preference is to use 'static' keyword rather than use unnamed
namespace.

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

Review URL: https://codereview.chromium.org/132403008

git-svn-id: http://skia.googlecode.com/svn/trunk@13138 2bbb7eff-a529-9590-31e7-b0007b416f81
6 files changed