Output list of differences to JSON file.

Output list of differences to JSON file.

It might be easier to investigate the reason of non-deterministic build,
if we keep binaries to somewhere.  To do so, let me make caller to know
list of differences via JSON file.

BUG=654989
Committed: https://crrev.com/a7498c76194b55b499beaf3e27ef28bbea2ea80d
Cr-Commit-Position: refs/heads/master@{#431583}

[Yoshisato Yanagisawa, 2016-11-11 09:27:00]

yyanagisawa@chromium.org changed reviewers:
+ dpranke@chromium.org, maruel@chromium.org

[M-A Ruel, 2016-11-11 16:32:14]

The CQ bit was checked by maruel@chromium.org

[M-A Ruel, 2016-11-11 16:32:15]

lgtm

[commit-bot: I haz the power, 2016-11-11 16:32:33]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-11 16:59:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-11 17:03:23]

Description was changed from

==========
Output list of differences to JSON file.

It might be easier to investigate the reason of non-deterministic build,
if we keep binaries to somewhere.  To do so, let me make caller to know
list of differences via JSON file.

BUG=654989
==========

to

==========
Output list of differences to JSON file.

It might be easier to investigate the reason of non-deterministic build,
if we keep binaries to somewhere.  To do so, let me make caller to know
list of differences via JSON file.

BUG=654989

Committed: https://crrev.com/a7498c76194b55b499beaf3e27ef28bbea2ea80d
Cr-Commit-Position: refs/heads/master@{#431583}
==========

[commit-bot: I haz the power, 2016-11-11 17:03:24]

Patchset 1 (id:??) landed as
https://crrev.com/a7498c76194b55b499beaf3e27ef28bbea2ea80d
Cr-Commit-Position: refs/heads/master@{#431583}

[Dirk Pranke, 2016-11-11 17:51:08]

lgtm