Add support for micro-tasks in Dartium.

Add support for micro-tasks in Dartium.

We are using the MutationObserver to schedule immediate events.

BUG=
R=blois@google.com, floitsch@google.com, vsm@google.com

Committed: https://code.google.com/p/dart/source/detail?r=28715

[Anders Johnsen, 2013-10-03 14:46:36]

This patch is based on the work in https://codereview.chromium.org/25646004/.

WebKit binding CL: https://codereview.chromium.org/25846004/

[blois, 2013-10-03 16:54:29]

https://codereview.chromium.org/25722010/diff/1/tools/dom/src/native_DOMImple...
File tools/dom/src/native_DOMImplementation.dart (right):

https://codereview.chromium.org/25722010/diff/1/tools/dom/src/native_DOMImple...
tools/dom/src/native_DOMImplementation.dart:420:
_enqueueImmediateHelperNode.attributes.clear();
The attributes getter isn't as lightweight as it should be, a better trigger
which we use in dart:html right now is:

_enqueueImmediateHelperNode.hidden = !_enqueueImmediateHelperNode.hidden;

Also seems like the MutationObserver itself should be cached and reused. See:
https://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/tool...

[Anders Johnsen, 2013-10-10 14:48:54]

PTAL

https://codereview.chromium.org/25722010/diff/1/tools/dom/src/native_DOMImple...
File tools/dom/src/native_DOMImplementation.dart (right):

https://codereview.chromium.org/25722010/diff/1/tools/dom/src/native_DOMImple...
tools/dom/src/native_DOMImplementation.dart:420:
_enqueueImmediateHelperNode.attributes.clear();
On 2013/10/03 16:54:29, blois wrote:
> The attributes getter isn't as lightweight as it should be, a better trigger
> which we use in dart:html right now is:
> 
> _enqueueImmediateHelperNode.hidden = !_enqueueImmediateHelperNode.hidden;
> 
> Also seems like the MutationObserver itself should be cached and reused. See:
>
https://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/tool...

Done.

[floitsch, 2013-10-10 16:02:17]

LGTM.
Please wait for an LGTM from HTML devs.

https://codereview.chromium.org/25722010/diff/6001/tools/dom/src/native_DOMIm...
File tools/dom/src/native_DOMImplementation.dart (right):

https://codereview.chromium.org/25722010/diff/6001/tools/dom/src/native_DOMIm...
tools/dom/src/native_DOMImplementation.dart:531: final Element _dummy = new
DivElement();
s/_dummy/_div

[blois, 2013-10-10 17:12:22]

lgtm

[vsm, 2013-10-11 19:49:58]

lgtm

[Anders Johnsen, 2013-10-15 17:21:17]

@floitch, PTAL after renaming.

https://chromiumcodereview.appspot.com/25722010/diff/6001/tools/dom/src/nativ...
File tools/dom/src/native_DOMImplementation.dart (right):

https://chromiumcodereview.appspot.com/25722010/diff/6001/tools/dom/src/nativ...
tools/dom/src/native_DOMImplementation.dart:531: final Element _dummy = new
DivElement();
On 2013/10/10 16:02:18, floitsch wrote:
> s/_dummy/_div

Done.

[floitsch, 2013-10-15 17:24:35]

LGTM.

[Anders Johnsen, 2013-10-16 09:16:30]

Committed patchset #3 manually as r28715 (presubmit successful).