Adding WebRTC performance expectations.

Adding WebRTC performance expectations.

This will be used to keep track of WebRTC's performance tests. These used to be in the internal build bot code for WebRTC, but we need to move them due to a recent chrome infra change. We can't put them in the regular tools/perf_expectations yet since we are not done migrating to chrome infra. This is expected to be temporary.

BUG=
NOTRY=True


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=192820

[phoglund_chromium, 2013-04-08 10:52:20]

I put the webrtc perfomance expectations in chrome/browser/media as it felt as a
reasonable "home" for webrtc. Let me know if you have some better idea.

kjellander@: main review
xians@: owner stamp

[kjellander_chromium, 2013-04-08 14:07:00]

I suggest putting these files in a new folder instead:
tools/webrtc_perf_expectations

Mention in the description that we need this approach only temporarily until
we've moved over all tests into Chrome infra. 
Also mention that a similar approach is used for 
native_client/tools/nacl_perf_expectations, but that we don't have a similar
"home" for WebRTC stuff.

I also think we should add a similar README file like NaCl has.

[phoglund_chromium, 2013-04-08 14:15:18]

PTAL

(xians no longer need to review).

[kjellander_chromium, 2013-04-08 14:21:21]

lgtm

[commit-bot: I haz the power, 2013-04-08 14:22:12]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/phoglund@chromium.org/13773008/7001

[commit-bot: I haz the power, 2013-04-08 14:22:25]

Change committed as 192820

[no longer working on chromium, 2013-04-08 14:33:26]

lgtm, % nits

https://codereview.chromium.org/13773008/diff/7001/tools/webrtc_perf_expectat...
File tools/webrtc_perf_expectations/README (right):

https://codereview.chromium.org/13773008/diff/7001/tools/webrtc_perf_expectat...
tools/webrtc_perf_expectations/README:2: Overview
should we follow some existing README pattern, like src/testing/gmock/README?

https://codereview.chromium.org/13773008/diff/7001/tools/webrtc_perf_expectat...
File tools/webrtc_perf_expectations/perf_expectations.json (right):

https://codereview.chromium.org/13773008/diff/7001/tools/webrtc_perf_expectat...
tools/webrtc_perf_expectations/perf_expectations.json:5:
"linux-chrome-pure/webrtc_pyauto/cpu/jsep01_call": {"reva": 177905, "revb":
178004, "type": "absolute", "improve": 21.185, "regress": 39.375, "sha1":
"5403a58a"},
nit, alphabet order