[telemetry] Rename TraceData.[Has,Get]EventsFor to [Has,Get]TraceFor

[telemetry] Rename TraceData.[Has,Get]EventsFor to [Has,Get]TraceFor

This is part of the transition from the old world, where only events
are contained in part, to the new world, where a part contain both
events and metadata.

This is necessary in order to get Chrome/Telemetry clock sync working.

BUG=catapult:#2341

Committed: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+/8fa1ba412a7ded4228e3ee696f4723b01f7a3b61

[charliea (OOO until 10-5), 2016-05-23 18:38:05]

charliea@chromium.org changed reviewers:
+ nednguyen@google.com

[nednguyen, 2016-05-23 18:38:57]

lgtm

[charliea (OOO until 10-5), 2016-05-23 18:42:04]

The CQ bit was checked by charliea@chromium.org

[commit-bot: I haz the power, 2016-05-23 18:42:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2002193002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2002193002/1

[commit-bot: I haz the power, 2016-05-23 19:06:02]

Description was changed from

==========
[telemetry] Rename TraceData.[Has,Get]EventsFor to [Has,Get]TraceFor

This is part of the transition from the old world, where only events
are contained in part, to the new world, where a part contain both
events and metadata.

This is necessary in order to get Chrome/Telemetry clock sync working.

BUG=catapult:#2341
==========

to

==========
[telemetry] Rename TraceData.[Has,Get]EventsFor to [Has,Get]TraceFor

This is part of the transition from the old world, where only events
are contained in part, to the new world, where a part contain both
events and metadata.

This is necessary in order to get Chrome/Telemetry clock sync working.

BUG=catapult:#2341

Committed:
https://chromium.googlesource.com/external/github.com/catapult-project/catapu...
==========

[commit-bot: I haz the power, 2016-05-23 19:06:03]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/github.com/catapult-project/catapu...