Change append to appendf for call sites with no format arguments.

Original CL: http://codereview.appspot.com/5685062/

Review URL: https://codereview.appspot.com/5686059

git-svn-id: http://skia.googlecode.com/svn/trunk@3225 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed