Revert of Make ImageBitmap Transferable

Revert of Make ImageBitmap Transferable (patchset #9 id:160001 of https://codereview.chromium.org/1409243005/ )

Reason for revert:
There are tests that are crashed: https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Linux_Oilpan_Leak/14727/layout-test-results/results.html

Original issue's description:
> Make ImageBitmap Transferable
>
> Including a layout test that does 2 things:
> 1. transfer an ImageBitmap to the worker and let worker transfer back to
>    main, the main thread exam the transfered-back ImageBitmap to make
>    sure the data is the same as the original ImageBitmap.
> 2. When worker receives the ImageBitmap from main, worker calls
>    createImageBimmap() to create a new ImageBitmap and send it back to
>    main.
>
> BUG=532142
>
> Committed: https://crrev.com/5d8ed50933226127fdc64744d86ab3d9b7d57276
> Cr-Commit-Position: refs/heads/master@{#356575}

TBR=jochen@chromium.org,chrishtr@chromium.org,junov@chromium.org,haraken@chromium.org,sigbjornf@opera.com,yutak@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=532142
Committed: https://crrev.com/29f2c1d075f48f83978731e4209445dbd88e22c8
Cr-Commit-Position: refs/heads/master@{#356840}

[xidachen, 2015-10-29 14:20:14]

Created Revert of Make ImageBitmap Transferable

[commit-bot: I haz the power, 2015-10-29 14:20:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1413723004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1413723004/1

[commit-bot: I haz the power, 2015-10-29 14:20:44]

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

[commit-bot: I haz the power, 2015-10-29 14:20:44]

No L-G-T-M from a valid reviewer yet. Only full committers are accepted.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[xidachen, 2015-10-29 14:29:30]

The CQ bit was checked by xidachen@chromium.org

[commit-bot: I haz the power, 2015-10-29 14:29:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1413723004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1413723004/1

[commit-bot: I haz the power, 2015-10-29 14:29:46]

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

[commit-bot: I haz the power, 2015-10-29 14:29:47]

No L-G-T-M from a valid reviewer yet. Only full committers are accepted.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[jbroman, 2015-10-29 14:44:15]

jbroman@chromium.org changed reviewers:
+ jbroman@chromium.org

[jbroman, 2015-10-29 14:44:15]

lgtm; this is a revert to fix a bug

[jbroman, 2015-10-29 14:44:18]

The CQ bit was checked by jbroman@chromium.org

[commit-bot: I haz the power, 2015-10-29 14:44:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1413723004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1413723004/1

[commit-bot: I haz the power, 2015-10-29 14:46:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-29 14:47:19]

Patchset 1 (id:??) landed as
https://crrev.com/29f2c1d075f48f83978731e4209445dbd88e22c8
Cr-Commit-Position: refs/heads/master@{#356840}

[haraken, 2015-10-29 14:58:38]

LGTM