Remove obsolete document wrapper creation in named constructors

Remove obsolete document wrapper creation in named constructors

For historical reasons, named constructor callbacks contained the code

  toV8(document, info.Holder(), isolate);

to ensure a document wrapper was created. This was necessary to ensure
the asynchronous lifetime of HTMLAudioElement and HTMLImageElement.

This is no longer the case, so drop the extra code.

R=haraken
BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=176868

[Jens Widell, 2014-06-24 08:24:04]

Clean-up as explained in https://codereview.chromium.org/340763003/#msg13.

With some additional minor changes, the template code for regular constructors
and named constructors becomes very similar. Worth-while to make the common bits
shared? (In a different CL, of course.)

[haraken, 2014-06-24 08:32:00]

LGTM.

> Clean-up as explained in https://codereview.chromium.org/340763003/#msg13.
> 
> With some additional minor changes, the template code for regular constructors
> and named constructors becomes very similar. Worth-while to make the common
bits
> shared? (In a different CL, of course.)

Makes sense!

[Jens Widell, 2014-06-24 08:39:20]

The CQ bit was checked by jl@opera.com

[commit-bot: I haz the power, 2014-06-24 08:40:01]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jl@opera.com/353623003/1

[commit-bot: I haz the power, 2014-06-24 09:41:38]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-06-24 10:21:36]

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

[commit-bot: I haz the power, 2014-06-24 10:21:37]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[Jens Widell, 2014-06-24 12:31:36]

The CQ bit was checked by jl@opera.com

[commit-bot: I haz the power, 2014-06-24 12:31:55]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jl@opera.com/353623003/1

[commit-bot: I haz the power, 2014-06-24 13:10:38]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-06-24 13:54:10]

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

[commit-bot: I haz the power, 2014-06-24 13:54:11]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[Jens Widell, 2014-06-24 18:12:04]

The CQ bit was checked by jl@opera.com

[commit-bot: I haz the power, 2014-06-24 18:12:19]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jl@opera.com/353623003/1

[commit-bot: I haz the power, 2014-06-24 19:20:07]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-06-24 19:44:12]

Change committed as 176868