Revert "Revert "Start of dartium custom element lifecycle event support.""

Revert "Revert "Start of dartium custom element lifecycle event support.""

Primary changes are that a fast-path has been added for the single-argument Document.createElement and the systemnative.py changes were split out to CL https://codereview.chromium.org/24661002/.

This is dependent on https://codereview.chromium.org/24677002/

First patch is the original, second is the updates.

BUG=
R=vsm@google.com

Committed: https://code.google.com/p/dart/source/detail?r=27921

[vsm, 2013-09-25 22:27:40]

lgtm

https://codereview.chromium.org/24491003/diff/3001/tools/dom/templates/html/i...
File tools/dom/templates/html/impl/impl_Document.darttemplate (right):

https://codereview.chromium.org/24491003/diff/3001/tools/dom/templates/html/i...
tools/dom/templates/html/impl/impl_Document.darttemplate:47: } else {
Can you add a comment here to note that this is a fast path for the common
non-type-extension case?

[blois, 2013-09-25 22:50:43]

https://codereview.chromium.org/24491003/diff/3001/tools/dom/templates/html/i...
File tools/dom/templates/html/impl/impl_Document.darttemplate (right):

https://codereview.chromium.org/24491003/diff/3001/tools/dom/templates/html/i...
tools/dom/templates/html/impl/impl_Document.darttemplate:47: } else {
On 2013/09/25 22:27:40, vsm wrote:
> Can you add a comment here to note that this is a fast path for the common
> non-type-extension case?

Done.

[blois, 2013-09-25 23:15:14]

Committed patchset #3 manually as r27921 (presubmit successful).