Rearrange SkRecord public API to fit better with cc/resources/picture

BUG=skia:2378
R=reed@google.com, danakj@chromium.org, enne@chromium.org, mtklein@google.com, robertphillips@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/248033002

git-svn-id: http://skia.googlecode.com/svn/trunk@14351 2bbb7eff-a529-9590-31e7-b0007b416f81
7 files changed