[DevTools] Call directly into underlying http transaction when throttling is disabled.

[DevTools] Call directly into underlying http transaction when throttling is disabled.

This guarantees that any throttling-specific errors do no affect no-throttling scenario.

BUG=none

Committed: https://crrev.com/881ef3f3d4e0738c30af2ef47a728dba5dfa94a0
Cr-Commit-Position: refs/heads/master@{#361193}

[dgozman, 2015-11-20 22:13:09]

dgozman@chromium.org changed reviewers:
+ pfeldman@chromium.org

[dgozman, 2015-11-20 22:13:09]

Take a look please.

[pfeldman, 2015-11-20 22:42:06]

lgtm

[dgozman, 2015-11-20 22:43:35]

The CQ bit was checked by dgozman@chromium.org

[commit-bot: I haz the power, 2015-11-20 22:45:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1461403003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1461403003/1

[commit-bot: I haz the power, 2015-11-20 23:19:07]

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

[commit-bot: I haz the power, 2015-11-20 23:19:07]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[dgozman, 2015-11-23 20:19:05]

The CQ bit was checked by dgozman@chromium.org

[dgozman, 2015-11-23 20:19:05]

The patchset sent to the CQ was uploaded after l-g-t-m from
pfeldman@chromium.org
Link to the patchset: https://codereview.chromium.org/1461403003/#ps20001
(title: "wrong order")

[commit-bot: I haz the power, 2015-11-23 20:22:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1461403003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1461403003/20001

[commit-bot: I haz the power, 2015-11-23 21:49:58]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-11-23 21:50:59]

Patchset 2 (id:??) landed as
https://crrev.com/881ef3f3d4e0738c30af2ef47a728dba5dfa94a0
Cr-Commit-Position: refs/heads/master@{#361193}