arc: Make IntentHelper::OpenFileToRead's return value nullable

arc: Make IntentHelper::OpenFileToRead's return value nullable

Version number is not changed as this method has not been implemented by
Android side yet.

BUG=654684
Committed: https://crrev.com/2eb325852a4e5e6509de26200b35be3ff85f8c27
Cr-Commit-Position: refs/heads/master@{#430726}

[hashimoto, 2016-11-08 19:31:51]

hashimoto@chromium.org changed reviewers:
+ rickyz@chromium.org

[hashimoto, 2016-11-08 19:32:05]

The CQ bit was checked by hashimoto@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-08 19:33:00]

Dry run: 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, 2016-11-08 20:55:29]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-08 20:55:30]

Dry run: This issue passed the CQ dry run.

[rickyz (no longer on Chrome), 2016-11-08 21:26:48]

lgtm

[hashimoto, 2016-11-08 21:45:44]

The CQ bit was checked by hashimoto@chromium.org

[commit-bot: I haz the power, 2016-11-08 21:46:19]

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, 2016-11-08 21:52:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-08 21:57:58]

Description was changed from

==========
arc: Make IntentHelper::OpenFileToRead's return value nullable

Version number is not changed as this method has not been implemented by
Android side yet.

BUG=654684
==========

to

==========
arc: Make IntentHelper::OpenFileToRead's return value nullable

Version number is not changed as this method has not been implemented by
Android side yet.

BUG=654684

Committed: https://crrev.com/2eb325852a4e5e6509de26200b35be3ff85f8c27
Cr-Commit-Position: refs/heads/master@{#430726}
==========

[commit-bot: I haz the power, 2016-11-08 21:57:59]

Patchset 1 (id:??) landed as
https://crrev.com/2eb325852a4e5e6509de26200b35be3ff85f8c27
Cr-Commit-Position: refs/heads/master@{#430726}