Add DevTools method for cross-process memory notification suppressing

Add DevTools method for cross-process memory notification suppressing

This patch adds Memory.setPressureNotificationsSuppressed method to
DevTools API.

The underlying IPC architecture was added in
https://codereview.chromium.org/1361963002.

Proposal: https://goo.gl/cZFdH3

BUG=516776
Committed: https://crrev.com/a954d6b30bffd58a21dfd2d9f850329e126d399c
Cr-Commit-Position: refs/heads/master@{#350550}

[petrcermak, 2015-09-14 18:16:18]

Patchset #2 (id:20001) has been deleted

[petrcermak, 2015-09-14 18:16:23]

Patchset #1 (id:1) has been deleted

[petrcermak, 2015-09-14 18:25:08]

Patchset #1 (id:40001) has been deleted

[petrcermak, 2015-09-17 16:14:49]

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

[petrcermak, 2015-09-17 16:14:49]

Hi, please review this small patch.

Thanks,
Petr

[pfeldman, 2015-09-17 19:13:25]

lgtm

[petrcermak, 2015-09-24 13:30:45]

https://codereview.chromium.org/1311343007/ and
https://codereview.chromium.org/1342833004/ were merged into this patch after
the Blink merge. Both patches had been approved by pfeldman.

[petrcermak, 2015-09-24 13:31:18]

The CQ bit was checked by petrcermak@chromium.org

[petrcermak, 2015-09-24 13:31:18]

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/1336363002/#ps100001
(title: "Merge patches (after Blink merge)")

[commit-bot: I haz the power, 2015-09-24 13:31:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1336363002/100001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1336363002/100001

[commit-bot: I haz the power, 2015-09-24 14:46:00]

Committed patchset #3 (id:100001)

[commit-bot: I haz the power, 2015-09-24 14:46:46]

Patchset 3 (id:??) landed as
https://crrev.com/a954d6b30bffd58a21dfd2d9f850329e126d399c
Cr-Commit-Position: refs/heads/master@{#350550}