Reland: [Oilpan] Move MediaStream{Source|Component|Descriptor} to Oilpan heap

Reland "Revert of [Oilpan] Move MediaStream{Source|Component|Descriptor} to Oilpan heap"
https://codereview.chromium.org/1363143003/

We think the tests that the original CL failed need
to run more GCs to collect all objects.
So we expect https://codereview.chromium.org/1383803003/
fixes the issue and we can land this CL again.

BUG=496535
Committed: https://crrev.com/05c95a5912f97f877aa75bbd55581778ba7044d6
Cr-Commit-Position: refs/heads/master@{#352507}

[peria, 2015-10-05 03:54:25]

peria@chromium.org changed reviewers:
+ oilpan-reviews@chromium.org, tkent@chromium.org

[peria, 2015-10-05 03:54:25]

PTL.
This CL needs to be committed after https://codereview.chromium.org/1383803003/.

[peria, 2015-10-05 03:54:32]

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

[commit-bot: I haz the power, 2015-10-05 03:54:38]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1384233002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1384233002/1

[haraken, 2015-10-05 03:59:10]

LGTM to try.

[tkent, 2015-10-05 04:01:28]

tkent@chromium.org changed reviewers:
+ haraken@chromium.org

[tkent, 2015-10-05 04:01:28]

Why don't you update user_media_client_impl_unittest.cc in this CL?

[haraken, 2015-10-05 04:04:12]

On 2015/10/05 04:01:28, tkent wrote:
> Why don't you update user_media_client_impl_unittest.cc in this CL?

It will be fixed in https://codereview.chromium.org/1383803003/. We want to land
the fix separately since the test fix is a good thing even if the fix doesn't
address the issue exposed by the MediaStreamSource CL.

[peria, 2015-10-05 04:08:01]

On 2015/10/05 04:01:28, tkent wrote:
> Why don't you update user_media_client_impl_unittest.cc in this CL?

I think the test behavior should be updated independently from other changes. 
The fix changed in https://codereview.chromium.org/1383803003/ is useful
even if this CL doesn't regress the tests.

[commit-bot: I haz the power, 2015-10-05 05:35:38]

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

[commit-bot: I haz the power, 2015-10-05 05:35:39]

Dry run: This issue passed the CQ dry run.

[tkent, 2015-10-06 01:19:58]

lgtm

[peria, 2015-10-06 01:27:13]

The CQ bit was checked by peria@chromium.org

[commit-bot: I haz the power, 2015-10-06 01:27:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1384233002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1384233002/1

[commit-bot: I haz the power, 2015-10-06 01:35:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-06 01:36:57]

Patchset 1 (id:??) landed as
https://crrev.com/05c95a5912f97f877aa75bbd55581778ba7044d6
Cr-Commit-Position: refs/heads/master@{#352507}