Delete unused function SetSessionError.

Delete unused function SetSessionError.

https://webrtc-codereview.appspot.com/47589004/ remove the use.

BUG=505316
Moved to https://codereview.webrtc.org/1299703002

[Nico, 2015-08-16 01:30:16]

thakis@chromium.org changed reviewers:
+ sergeyu@chromium.org

[Sergey Ulanov, 2015-08-16 22:49:25]

lgtm

[Nico, 2015-08-17 04:04:46]

Thanks! How do I land this? `git cl land` says 

"Fetching pending ref refs/pending/heads/master...
fatal: Couldn't find remote ref refs/pending/heads/master
Unexpected end of command stream
fatal: Couldn't find remote ref refs/pending/heads/master
Unexpected end of command stream
fatal: Couldn't find remote ref refs/pending/heads/master
Unexpected end of command stream"

and so on.

[Nico, 2015-08-17 04:04:57]

The CQ bit was checked by thakis@chromium.org

[commit-bot: I haz the power, 2015-08-17 04:05:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1296103002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1296103002/1

[commit-bot: I haz the power, 2015-08-17 04:05:34]

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

[commit-bot: I haz the power, 2015-08-17 04:05:35]

Try jobs failed on following builders:
  android_gn_rel on tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/android_gn_rel/builds/5081)
  linux on tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/linux/builds/9023)
  linux_tsan2 on tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/linux_tsan2/builds/6202)

[Nico, 2015-08-17 17:01:28]

Ping on """Thanks! How do I land this? `git cl land` says 

"Fetching pending ref refs/pending/heads/master...
fatal: Couldn't find remote ref refs/pending/heads/master
Unexpected end of command stream
fatal: Couldn't find remote ref refs/pending/heads/master
Unexpected end of command stream
fatal: Couldn't find remote ref refs/pending/heads/master
Unexpected end of command stream"

and so on."""

[Nico, 2015-08-17 18:06:24]

Trying again at https://codereview.webrtc.org/1299703002 :-)

[pthatcher1, 2015-08-19 21:44:45]

pthatcher@webrtc.org changed reviewers:
+ pthatcher@webrtc.org

[pthatcher1, 2015-08-19 21:44:45]

It looks like it has already been removed:

https://code.google.com/p/chromium/codesearch#chromium/src/third_party/libjin...