Re-reland: Add MemoryCoordinator

Re-reland: Add MemoryCoordinator

This is third attempt. `git cl try` doesn't help me :(

Original description:

This CL adds MemoryCoordinator mojo interface and
its implementation. When --enable-features=MemoryCoordinator
is specified the browser and renderers create their
MemoryCoordinators. MemoryCoordinatorImpl (which lives in
the browser process) creates a mojo message pipe when a
renderer is launched.

This CL doesn't add actual handling of memory events, which
will be implemented in follow-up CLs.

BUG=617492
TBR=chrisha@chromium.org,haraken@chromium.org,dcheng@chromium.org,jam@chromium.org

Committed: https://crrev.com/c9dbbe31830fb0bc3014c21885880f3977323578
Cr-Commit-Position: refs/heads/master@{#405646}

[bashi, 2016-07-14 23:33:27]

The CQ bit was checked by bashi@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-07-14 23:34:02]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-15 00:18:01]

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

[commit-bot: I haz the power, 2016-07-15 00:18:02]

Dry run: This issue passed the CQ dry run.

[bashi, 2016-07-15 00:28:36]

Third attempt... (sorry for the noise again)

[bashi, 2016-07-15 00:28:59]

The CQ bit was checked by bashi@chromium.org

[commit-bot: I haz the power, 2016-07-15 00:29:32]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-15 00:35:17]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-15 00:35:35]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-07-15 00:37:56]

Description was changed from

==========
Re-reland: Add MemoryCoordinator

This is third attempt. `git cl try` doesn't help me :(

Original description:

This CL adds MemoryCoordinator mojo interface and
its implementation. When --enable-features=MemoryCoordinator
is specified the browser and renderers create their
MemoryCoordinators. MemoryCoordinatorImpl (which lives in
the browser process) creates a mojo message pipe when a
renderer is launched.

This CL doesn't add actual handling of memory events, which
will be implemented in follow-up CLs.

BUG=617492
TBR=chrisha@chromium.org,haraken@chromium.org,dcheng@chromium.org,jam@chromiu...
==========

to

==========
Re-reland: Add MemoryCoordinator

This is third attempt. `git cl try` doesn't help me :(

Original description:

This CL adds MemoryCoordinator mojo interface and
its implementation. When --enable-features=MemoryCoordinator
is specified the browser and renderers create their
MemoryCoordinators. MemoryCoordinatorImpl (which lives in
the browser process) creates a mojo message pipe when a
renderer is launched.

This CL doesn't add actual handling of memory events, which
will be implemented in follow-up CLs.

BUG=617492
TBR=chrisha@chromium.org,haraken@chromium.org,dcheng@chromium.org,jam@chromiu...

Committed: https://crrev.com/c9dbbe31830fb0bc3014c21885880f3977323578
Cr-Commit-Position: refs/heads/master@{#405646}
==========

[commit-bot: I haz the power, 2016-07-15 00:37:58]

Patchset 2 (id:??) landed as
https://crrev.com/c9dbbe31830fb0bc3014c21885880f3977323578
Cr-Commit-Position: refs/heads/master@{#405646}

[haraken, 2016-07-15 00:54:49]

LGTM

[bashi, 2016-07-15 01:05:50]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/2152713003/ by bashi@chromium.org.

The reason for reverting is: GYP!!!.