GitLab

   - Adds tests for SkRecordDraw's two main features: cull- and clip- based skipping.
   - Adds full SkCanvas semantic mode to SkRecorder, so it can be used as a target for SkRecordDraw.

BUG=skia:2378
R=fmalita@chromium.org, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/231653002

git-svn-id: http://skia.googlecode.com/svn/trunk@14124 2bbb7eff-a529-9590-31e7-b0007b416f81