Make arguments to some Document and Element methods non-optional

https://dom.spec.whatwg.org/#document
https://dom.spec.whatwg.org/#element

The modified missing-arguments.html tests all pass in IE11 and Firefox
Nightly 36.0a1, i.e. these arguments are already non-optional in those
browsers, which limits the possible breakage to WebKit-specific content.

Note that Document.createAttributeNS()'s qualifiedName argument should
not be nullable per spec, but that is an orthogonal issue.

BUG=325922

Review URL: https://codereview.chromium.org/737133002

git-svn-id: svn://svn.chromium.org/blink/trunk@185773 bbb929c8-8fbe-4397-9dbb-9b2b20218538
10 files changed
tree: a3f4cf951892023b28aa0f480a771e550ee55b18
  1. third_party/