tree 3e9cd0e470ada3c46a46836566ca16e1aee2b505
parent 64de1e179012302d5f3b805d0736a583ad91c6a2
author mtklein <mtklein@chromium.org> 1425573628 -0800
committer Commit bot <commit-bot@chromium.org> 1425573628 -0800

DM: support non-fatal errors

Tasks that produce a non-fatal error will bail out before writing their output to
disk and hash to dm.json, but not count as failures.

This also makes true failures bail out before writing their results.  If the DM
program failed, we probably don't want to triage that image result.

We use this new feature first to skip image subset decoding when we detect it's
not supported.  Here's a snippet of an example run, where in this case only
.webp are subset decodable:

...
(  15MB    12) 172µs	8888 subset color_wheel.jpg (skipped: Subset decoding not supported.)
(  15MB    11) 9.05ms	8888 subset randPixels.webp
(  16MB    10) 863µs	8888 subset baby_tux.png (skipped: Subset decoding not supported.)
...

Only outputs corresponding to the .webp show up, both on disk and in the .json.

BUG=skia:

Review URL: https://codereview.chromium.org/980333002