Fix delay plot crash in event_log_visualizer.

Fix delay plot crash in event_log_visualizer.

NOTRY=true
BUG=webrtc:6510

[stefan-webrtc, 2016-10-10 14:55:06]

stefan@webrtc.org changed reviewers:
+ henrik.lundin@webrtc.org

[stefan-webrtc, 2016-10-10 14:55:24]

Description was changed from

==========
Fix delay plot crash in event_log_visualizer.

BUG=webrtc:6510
==========

to

==========
Fix delay plot crash in event_log_visualizer.

NOTRY=true
BUG=webrtc:6510
==========

[hlundin-webrtc, 2016-10-10 15:02:08]

RS-LGTM

[stefan-webrtc, 2016-10-10 15:08:11]

The CQ bit was checked by stefan@webrtc.org

[commit-bot: I haz the power, 2016-10-10 15:08:17]

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

[commit-bot: I haz the power, 2016-10-10 15:16:35]

Description was changed from

==========
Fix delay plot crash in event_log_visualizer.

NOTRY=true
BUG=webrtc:6510
==========

to

==========
Fix delay plot crash in event_log_visualizer.

NOTRY=true
BUG=webrtc:6510

Committed: https://crrev.com/41aab327ad1b9f3ae40448a7e3957b21c0040574
Cr-Commit-Position: refs/heads/master@{#14588}
==========

[commit-bot: I haz the power, 2016-10-10 15:16:35]

Description was changed from

==========
Fix delay plot crash in event_log_visualizer.

NOTRY=true
BUG=webrtc:6510

Committed: https://crrev.com/41aab327ad1b9f3ae40448a7e3957b21c0040574
Cr-Commit-Position: refs/heads/master@{#14588}
==========

to

==========
Fix delay plot crash in event_log_visualizer.

NOTRY=true
BUG=webrtc:6510
==========

[commit-bot: I haz the power, 2016-10-10 15:16:35]

Patchset 1 (id:??) landed as
https://crrev.com/41aab327ad1b9f3ae40448a7e3957b21c0040574
Cr-Commit-Position: refs/heads/master@{#14588}

[commit-bot: I haz the power, 2016-10-10 15:16:36]

Committed patchset #1 (id:1)