Refined types for most HtmlElement factory constructors

Refined types for most HtmlElement factory constructors

The body of new DivElement() is marked as returning a DivElement, instead of inferred to return Element.
The more precise receiver type allows svg polyfills to be excluded, allowsing the HtmlElement methods to be identified as the single target and inlined.

This tends to improve the code generated for idioms like

    new DivElement()..classes.add('foo')

    var e1 = new DivElement();
    e1.children.add(e2);

BUG=
R=alanknight@google.com

Committed: https://github.com/dart-lang/sdk/commit/b7b12b564a3e1811ccfca3e28fe30dde685f6633

[sra1, 2017-02-22 04:47:55]

Patchset #2 (id:20001) has been deleted

[sra1, 2017-02-22 04:48:05]

Patchset #1 (id:1) has been deleted

[sra1, 2017-02-22 04:56:40]

Description was changed from

==========
Refined types for most HtmlElement factory constructors

BUG=
==========

to

==========
Refined types for most HtmlElement factory constructors

The body of new DivElement() is marked as returning a DivElement, instead of
inferred to return Element.
The more precise receiver type allows svg polyfills to be excluded, allowsing
the HtmlElement methods to be identified as the single target and inlined.

This tends to improve the code generated for idioms like 

    new DivElement()..classes.add('foo')

    var e1 = new DivElement();
    e1.children.add(e2);

BUG=
==========

[sra1, 2017-02-22 04:56:40]

sra@google.com changed reviewers:
+ alanknight@google.com

[Alan Knight, 2017-02-23 17:46:10]

lgtm

[sra1, 2017-02-24 19:23:21]

Description was changed from

==========
Refined types for most HtmlElement factory constructors

The body of new DivElement() is marked as returning a DivElement, instead of
inferred to return Element.
The more precise receiver type allows svg polyfills to be excluded, allowsing
the HtmlElement methods to be identified as the single target and inlined.

This tends to improve the code generated for idioms like 

    new DivElement()..classes.add('foo')

    var e1 = new DivElement();
    e1.children.add(e2);

BUG=
==========

to

==========
Refined types for most HtmlElement factory constructors

The body of new DivElement() is marked as returning a DivElement, instead of
inferred to return Element.
The more precise receiver type allows svg polyfills to be excluded, allowsing
the HtmlElement methods to be identified as the single target and inlined.

This tends to improve the code generated for idioms like

    new DivElement()..classes.add('foo')

    var e1 = new DivElement();
    e1.children.add(e2);

BUG=
R=alanknight@google.com

Committed:
https://github.com/dart-lang/sdk/commit/b7b12b564a3e1811ccfca3e28fe30dde685f6633
==========

[sra1, 2017-02-24 19:23:22]

Committed patchset #1 (id:40001) manually as
b7b12b564a3e1811ccfca3e28fe30dde685f6633 (presubmit successful).