Remove TreatNullAs=NullString for HTMLFormElement

Remove TreatNullAs=NullString for HTMLFormElement

http://www.whatwg.org/specs/web-apps/current-work/multipage/forms.html#htmlformelement

The tests for the updated properties pass in Firefox Nightly, IE11
Release Preview and Opera 12.16, with these exceptions:

Firefox reflects autocomplete as 'on', which is per spec since
autocomplete is an enumerated attribute, but this will not be fixed in
Blink as part of this change.

IE11 throws an exception for enctype, encoding and method.

Opera doesn't support autocomplete and reflects encoding as 'null'.

BUG=310298
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=162029

[jochen (gone - plz use gerrit), 2013-11-14 11:49:03]

the trybots don't like your change?

[philipj_slow, 2013-11-14 12:13:24]

On 2013/11/14 11:49:03, jochen wrote:
> the trybots don't like your change?

Fixed the failing test, but the patch now depends on
https://codereview.chromium.org/70103011/ so the trybots will fail if started
now.

[jochen (gone - plz use gerrit), 2013-11-14 12:17:01]

lgtm

[commit-bot: I haz the power, 2013-11-14 13:10:52]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/philipj@opera.com/60733023/60001

[commit-bot: I haz the power, 2013-11-14 13:10:55]

Failed to apply patch for
LayoutTests/fast/dom/domstring-attribute-reflection.html:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file LayoutTests/fast/dom/domstring-attribute-reflection.html
  Hunk #1 FAILED at 55.
  1 out of 1 hunk FAILED -- saving rejects to file
LayoutTests/fast/dom/domstring-attribute-reflection.html.rej

Patch:       LayoutTests/fast/dom/domstring-attribute-reflection.html
Index: LayoutTests/fast/dom/domstring-attribute-reflection.html
diff --git a/LayoutTests/fast/dom/domstring-attribute-reflection.html
b/LayoutTests/fast/dom/domstring-attribute-reflection.html
index
e5b395403e6d4e6b4acf83ded913ec197dd74b14..e9b3d4d65938df6849699c422de2467d3e7966f2
100644
--- a/LayoutTests/fast/dom/domstring-attribute-reflection.html
+++ b/LayoutTests/fast/dom/domstring-attribute-reflection.html
@@ -55,7 +55,7 @@ function testDOMStringReflection(elementName,
contentAttributeName, idlAttribute
 
 testDOMStringReflection('button', 'name', 'name', true);
 testDOMStringReflection('fieldset', 'name', 'name', true);
-testDOMStringReflection('form', 'name');
+testDOMStringReflection('form', 'name', 'name', true);
 testDOMStringReflection('input', 'name');
 testDOMStringReflection('input', 'step');
 testDOMStringReflection('keygen', 'name');

[commit-bot: I haz the power, 2013-11-14 14:13:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/philipj@opera.com/60733023/60001

[commit-bot: I haz the power, 2013-11-14 15:35:55]

Change committed as 162029