Adjust key behaviour for weak collections

Adjust key behaviour for weak collections

R=dslomov@chromium.org
BUG=460083, v8:3970, v8:3971
LOG=Y

Committed: https://crrev.com/7875a8912228bd5534de916834c8d46d5d987d39
Cr-Commit-Position: refs/heads/master@{#27272}

[Dmitry Lomov (no reviews), 2015-03-18 10:55:45]

lgtm % test

https://codereview.chromium.org/1018923002/diff/1/test/mjsunit/es6/collection...
File test/mjsunit/es6/collections.js (right):

https://codereview.chromium.org/1018923002/diff/1/test/mjsunit/es6/collection...
test/mjsunit/es6/collections.js:54: assertDoesNotThrow(function () {
m.get(undefined) });
Validate the return value here and below

[rossberg, 2015-03-18 11:59:25]

https://codereview.chromium.org/1018923002/diff/1/test/mjsunit/es6/collection...
File test/mjsunit/es6/collections.js (right):

https://codereview.chromium.org/1018923002/diff/1/test/mjsunit/es6/collection...
test/mjsunit/es6/collections.js:54: assertDoesNotThrow(function () {
m.get(undefined) });
On 2015/03/18 10:55:44, Dmitry Lomov (chromium) wrote:
> Validate the return value here and below

The actual behaviour ought to be tested further below. I extended those tests to
cover more cases.

[rossberg, 2015-03-18 11:59:30]

The CQ bit was checked by rossberg@chromium.org

[rossberg, 2015-03-18 11:59:30]

The patchset sent to the CQ was uploaded after l-g-t-m from dslomov@chromium.org
Link to the patchset: https://codereview.chromium.org/1018923002/#ps20001
(title: "Comments")

[commit-bot: I haz the power, 2015-03-18 11:59:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1018923002/20001

[commit-bot: I haz the power, 2015-03-18 12:51:53]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-18 12:52:06]

Patchset 2 (id:??) landed as
https://crrev.com/7875a8912228bd5534de916834c8d46d5d987d39
Cr-Commit-Position: refs/heads/master@{#27272}