Add low blur and AAClip options to picture bench.

Copy the settings instead of pointing to the
original set on the stack.
Review URL: https://codereview.appspot.com/6818103

git-svn-id: http://skia.googlecode.com/svn/trunk@6330 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed