[DevTools] Move from InstrumentingAgents to InstrumentingSessions.

[DevTools] Move from InstrumentingAgents to InstrumentingSessions.

InspectorSession now holds auto-generated InstrumentingAgents instance.

InspectorInstrumentation fetches InstrumentingSessions from different entities and
then calls into agents in each session. This could potentially speed up instrumentation
when inspector is not attached: we only have InspectorSession objects when attached,
while InstrumentingAgents object was always present before.

BUG=590878
Committed: https://crrev.com/946af3c81704defad704e49046c65e29ccd5f5dd
Cr-Commit-Position: refs/heads/master@{#388992}

[dgozman, 2016-04-21 00:02:47]

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

[dgozman, 2016-04-21 00:02:48]

Could you please take a look?

[pfeldman, 2016-04-21 01:24:21]

lgtm

[dgozman, 2016-04-21 03:16:37]

The CQ bit was checked by dgozman@chromium.org

[commit-bot: I haz the power, 2016-04-21 03:16:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1903953002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1903953002/1

[commit-bot: I haz the power, 2016-04-21 03:29:20]

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

[commit-bot: I haz the power, 2016-04-21 03:29:20]

Try jobs failed on following builders:
  chromeos_amd64-generic_chromium_compile_only_ng on tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromeos_amd64-...)

[dgozman, 2016-04-21 23:54:22]

The CQ bit was checked by dgozman@chromium.org

[dgozman, 2016-04-21 23:54:23]

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/1903953002/#ps20001
(title: "rebased")

[commit-bot: I haz the power, 2016-04-21 23:55:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1903953002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1903953002/20001

[commit-bot: I haz the power, 2016-04-22 01:14:43]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-22 19:43:07]

Description was changed from

==========
[DevTools] Move from InstrumentingAgents to InstrumentingSessions.

InspectorSession now holds auto-generated InstrumentingAgents instance.

InspectorInstrumentation fetches InstrumentingSessions from different entities
and
then calls into agents in each session. This could potentially speed up
instrumentation
when inspector is not attached: we only have InspectorSession objects when
attached,
while InstrumentingAgents object was always present before.

BUG=590878
==========

to

==========
[DevTools] Move from InstrumentingAgents to InstrumentingSessions.

InspectorSession now holds auto-generated InstrumentingAgents instance.

InspectorInstrumentation fetches InstrumentingSessions from different entities
and
then calls into agents in each session. This could potentially speed up
instrumentation
when inspector is not attached: we only have InspectorSession objects when
attached,
while InstrumentingAgents object was always present before.

BUG=590878

Committed: https://crrev.com/946af3c81704defad704e49046c65e29ccd5f5dd
Cr-Commit-Position: refs/heads/master@{#388992}
==========

[commit-bot: I haz the power, 2016-04-22 19:43:09]

Patchset 2 (id:??) landed as
https://crrev.com/946af3c81704defad704e49046c65e29ccd5f5dd
Cr-Commit-Position: refs/heads/master@{#388992}