Give AwakableList's wake-up method the old state in addition to the new state.

Give AwakableList's wake-up method the old state in addition to the new state.

* Also rename it from AwakeForStateChange() to OnStateChange().
* This is to prepare to make it possible to trigger on trailing edges in
  addition to leading edges (needed for wait sets, which watch state
  persistently).
* Also clean up some of the data pipe wake-up code, possibly fixing some
  bugs (but at the very least making things more obviously correct).
* (Some of the new code may be a bit slower than the old code, but ...
  it's also more obviously correct.)

R=vardhan@google.com
BUG=#350

Committed: https://chromium.googlesource.com/external/mojo/+/1b9cedff42bb9a2cf4ea82ac4d048ca50e67605a

[vardhan, 2016-06-17 20:19:23]

lgtm

[viettrungluu, 2016-06-17 20:38:24]

Description was changed from

==========
Give AwakableList's wake-up method the old state in addition to the new state.

* Also rename it from AwakeForStateChange() to OnStateChange().
* This is to prepare to make it possible to trigger on trailing edges in
  addition to leading edges (needed for wait sets, which watch state
  persistently).
* Also clean up some of the data pipe wake-up code, possibly fixing some
  bugs (but at the very least making things more obviously correct).
* (Some of the new code may be a bit slower than the old code, but ...
  it's also more obviously correct.)

R=vardhan@google.com
BUG=#350
==========

to

==========
Give AwakableList's wake-up method the old state in addition to the new state.

* Also rename it from AwakeForStateChange() to OnStateChange().
* This is to prepare to make it possible to trigger on trailing edges in
  addition to leading edges (needed for wait sets, which watch state
  persistently).
* Also clean up some of the data pipe wake-up code, possibly fixing some
  bugs (but at the very least making things more obviously correct).
* (Some of the new code may be a bit slower than the old code, but ...
  it's also more obviously correct.)

R=vardhan@google.com
BUG=#350

Committed:
https://chromium.googlesource.com/external/mojo/+/1b9cedff42bb9a2cf4ea82ac4d0...
==========

[viettrungluu, 2016-06-17 20:38:26]

Committed patchset #1 (id:1) manually as
1b9cedff42bb9a2cf4ea82ac4d048ca50e67605a (presubmit successful).