Remove support for the keygen tag

third_party/WebKit/Source/core/html/HTMLTagNames.in

Index: third_party/WebKit/Source/core/html/HTMLTagNames.in
diff --git a/third_party/WebKit/Source/core/html/HTMLTagNames.in b/third_party/WebKit/Source/core/html/HTMLTagNames.in
index 2f7f74117f5fc7c0f3d4509d2e6d49075354657c..769b5e7d9dfb21cf2db0a56ef9982412cda8e875 100644
--- a/third_party/WebKit/Source/core/html/HTMLTagNames.in
+++ b/third_party/WebKit/Source/core/html/HTMLTagNames.in
@@ -71,7 +71,7 @@ img interfaceName=HTMLImageElement, constructorNeedsFormElement, constructorNeed
 input constructorNeedsFormElement, constructorNeedsCreatedByParser
 ins interfaceName=HTMLModElement
 kbd interfaceName=HTMLElement
-keygen constructorNeedsFormElement
+keygen interfaceName=HTMLElement

[dominicc (has gone to gerrit), 2016/12/07 07:07:11]

I didn't read through the whole thread, but Domenic's original post at
https://github.com/whatwg/html/issues/2079 indicates a change more like deleting
this line entirely.

As-is doing createElement('keygen') produces something with prototype
HTMLElement. Removing it entirely creates HTMLUnknownElement like any other
random element name.

 label
 layer interfaceName=HTMLElement
 legend