Fold bench source file list into bench.gyp.

It is one less file and doesn't make things much worse.

BUG=None
TEST=./gyp_skia
R=mtklein@google.com

Author: tfarina@chromium.org

Review URL: https://codereview.chromium.org/83703004

git-svn-id: http://skia.googlecode.com/svn/trunk@12412 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed