Add SkString::appendU32() and SkString::appendU64()
as needed to re-land r9682

R=reed@google.com

Review URL: https://codereview.chromium.org/17448012

git-svn-id: http://skia.googlecode.com/svn/trunk@9686 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed