[chromedriver] Disable Timeline by default in performance logs

[chromedriver] Disable Timeline by default in performance logs

BUG=
TBR=stgao@chromium.org

Committed: https://crrev.com/547831fb0f49045bf3af52482ee4ce1f58a832f2
Cr-Commit-Position: refs/heads/master@{#319582}

[samuong, 2015-03-07 01:29:33]

samuong@chromium.org changed reviewers:
+ stgao@chromium.org

[samuong, 2015-03-07 01:29:34]

Timeline support has been removed in recent builds, so we should disable this by
default. Users who are running against old versions of Chrome can explicitly set
enableTimeline=true if they want this, for now.

[samuong, 2015-03-07 01:40:36]

TBR'ing to fix waterfall breakage.

[samuong, 2015-03-07 01:40:43]

The CQ bit was checked by samuong@chromium.org

[commit-bot: I haz the power, 2015-03-07 01:42:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/985243002/20001

[commit-bot: I haz the power, 2015-03-07 03:27:08]

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

[commit-bot: I haz the power, 2015-03-07 03:27:09]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[samuong, 2015-03-07 05:07:08]

The CQ bit was checked by samuong@chromium.org

[commit-bot: I haz the power, 2015-03-07 05:07:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/985243002/40001

[commit-bot: I haz the power, 2015-03-07 07:08:20]

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

[commit-bot: I haz the power, 2015-03-07 07:08:21]

Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build
URL)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build URL)
Timed out jobs are not retried to avoid causing additional load on the builders
with large pending queues.

[samuong, 2015-03-08 06:19:10]

The CQ bit was checked by samuong@chromium.org

[commit-bot: I haz the power, 2015-03-08 06:20:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/985243002/40001

[commit-bot: I haz the power, 2015-03-08 06:45:40]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-03-08 06:46:25]

Patchset 3 (id:??) landed as
https://crrev.com/547831fb0f49045bf3af52482ee4ce1f58a832f2
Cr-Commit-Position: refs/heads/master@{#319582}

[stgao, 2015-08-18 00:02:07]

lgtm