[Telemetry] Update facebook credential & reenable memory.top_7_stress

[Telemetry] Update facebook credential & re-record the facebook page in top_7_stress &  reenable  memory.top_7_stress.

BUG=459646
TEST=./tools/perf/run_benchmark memory.top_7_stress  --browser=system

Committed: https://crrev.com/86c9a9b5470c3c1292fc7a8e7e276045ab0f512c
Cr-Commit-Position: refs/heads/master@{#317793}

[nednguyen, 2015-02-24 03:16:52]

nednguyen@google.com changed reviewers:
+ dtu@chromium.org, sullivan@chromium.org

[sullivan, 2015-02-24 14:12:49]

The CQ bit was checked by sullivan@chromium.org

[sullivan, 2015-02-24 14:12:50]

lgtm

Thanks for doing this!

Note that for some reason this test was only failing on the reference builds
(m37), so there may be some other problems with it. Kari is planning to roll
reference builds in the next week or so, so if it still fails after this CL,
let's wait till we pick up her fix.

[commit-bot: I haz the power, 2015-02-24 14:13:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/951773002/1

[commit-bot: I haz the power, 2015-02-24 14:17:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-24 14:17:48]

Patchset 1 (id:??) landed as
https://crrev.com/86c9a9b5470c3c1292fc7a8e7e276045ab0f512c
Cr-Commit-Position: refs/heads/master@{#317793}

[nednguyen, 2015-02-24 15:55:44]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/952963002/ by nednguyen@google.com.

The reason for reverting is: Forgot to upload the wpr archive. Both the
reference build & current one are failing:
http://build.chromium.org/p/chromium.perf/builders/Linux%20Perf%20%283%29/bui....

[nednguyen, 2015-02-24 18:07:59]

Patchset #2 (id:20001) has been deleted