Always read .skp files and other serialized pictures into SkRecord.

Always read .skp files and other serialized pictures into SkRecord.

This should switch all our internal tools that aren't clever about it over to SkRecord pictures.  (The clever tools know what they're doing.)

Also, deletes the old SkPicture::clone() path.  return this or die.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/7b705bb17e09508e3761b54f59833b1ceb4ce9a6

R=robertphillips@google.com, mtklein@google.com, reed@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/481743003