Now pulling WebRTC telemetry pages from https instead of http.

Now pulling WebRTC telemetry pages from https instead of http.

https://codereview.chromium.org/1301653005 changed getUserMedia so it
only works for secure origins, which led gUM to be blocked. This patch
makes us pull our demo pages from https instead of http. Web page
replay seems to respect https, and will play back as https, so this
should solve the problem.

BUG=520765, 523517
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:linux_perf_bisect;tryserver.chromium.perf:mac_perf_bisect;tryserver.chromium.perf:win_perf_bisect;tryserver.chromium.perf:android_nexus5_perf_bisect

Committed: https://crrev.com/f0d3f1086f14baddc8914d3683125c65c4eed82c
Cr-Commit-Position: refs/heads/master@{#345350}

[phoglund_chromium, 2015-08-25 07:25:12]

phoglund@chromium.org changed reviewers:
+ sullivan@chromium.org

[sullivan, 2015-08-25 13:32:42]

lgtm

[phoglund_chromium, 2015-08-25 14:34:29]

The CQ bit was checked by phoglund@chromium.org

[commit-bot: I haz the power, 2015-08-25 14:35:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1313873002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1313873002/20001

[commit-bot: I haz the power, 2015-08-25 16:42:23]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-08-25 16:43:10]

Patchset 2 (id:??) landed as
https://crrev.com/f0d3f1086f14baddc8914d3683125c65c4eed82c
Cr-Commit-Position: refs/heads/master@{#345350}

[phoglund_chromium, 2015-08-26 15:51:34]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/1303193004/ by phoglund@chromium.org.

The reason for reverting is: Breaks
http://build.chromium.org/p/chromium.perf/builders/Linux%20Perf%20%284%29..