Add a focused public API for src/record.
commit-bot@chromium.org authored
BUG=skia:2378
R=reed@google.com, robertphillips@google.com, mtklein@google.com, fmalita@chromium.org

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/233053005

git-svn-id: http://skia.googlecode.com/svn/trunk@14146 2bbb7eff-a529-9590-31e7-b0007b416f81
18fd2b92