Revert of Update systrace and profile_chrome's default agent behavior

Revert of Update systrace and profile_chrome's default agent behavior (patchset #1 id:1 of https://codereview.chromium.org/2391383004/ )

Reason for revert:
Causing Chrome Perf bot to fail.

BUG=653898
Original issue's description:
> Update systrace and profile_chrome's default agent behavior
> 
> Systrace needs to have atrace as the default agent.
> profile_chrome needs to have Chrome tracing as the default agent.
> 
> BUG=catapult:#2912,catapult:#2781
> 
> Committed: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+/f7d080135d034437b8ce00208db09b28796490f3

TBR=ccraik@google.com,peter.y.washington@gmail.com,skyostil@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=catapult:#2912,catapult:#2781

Committed: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+/186f6b0164710aa9a37038a6f88b3665950887ed

[Zhen Wang, 2016-10-07 15:13:56]

The CQ bit was checked by zhenw@chromium.org

[Zhen Wang, 2016-10-07 15:13:56]

Created Revert of Update systrace and profile_chrome's default agent behavior

[commit-bot: I haz the power, 2016-10-07 15:14:01]

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, 2016-10-07 15:14:08]

Description was changed from

==========
Revert of Update systrace and profile_chrome's default agent behavior (patchset
#1 id:1 of https://codereview.chromium.org/2391383004/ )

Reason for revert:
Causing Chrome Perf bot to fail.

BUG=653898

Original issue's description:
> Update systrace and profile_chrome's default agent behavior
> 
> Systrace needs to have atrace as the default agent.
> profile_chrome needs to have Chrome tracing as the default agent.
> 
> BUG=catapult:#2912,catapult:#2781
> 
> Committed:
https://chromium.googlesource.com/external/github.com/catapult-project/catapu...

TBR=ccraik@google.com,peter.y.washington@gmail.com,skyostil@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=catapult:#2912,catapult:#2781
==========

to

==========
Revert of Update systrace and profile_chrome's default agent behavior (patchset
#1 id:1 of https://codereview.chromium.org/2391383004/ )

Reason for revert:
Causing Chrome Perf bot to fail.

BUG=653898

Original issue's description:
> Update systrace and profile_chrome's default agent behavior
> 
> Systrace needs to have atrace as the default agent.
> profile_chrome needs to have Chrome tracing as the default agent.
> 
> BUG=catapult:#2912,catapult:#2781
> 
> Committed:
https://chromium.googlesource.com/external/github.com/catapult-project/catapu...

TBR=ccraik@google.com,peter.y.washington@gmail.com,skyostil@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=catapult:#2912,catapult:#2781

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

[commit-bot: I haz the power, 2016-10-07 15:14:09]

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