rebase

TBR=
BUG=skia:

Review URL: https://codereview.chromium.org/822483003
Change DebugCanvas API to not encourage memory leaks

Pass command strings and offset arrays as out parameters instead of
returning new arrays from the functions.

This simplifies debugger leak investigations, as the app leaks less by
design.

Review URL: https://codereview.chromium.org/821663003
Update SKP version

Automatic commit by the RecreateSKPs bot.

TBR=

Review URL: https://codereview.chromium.org/831793002