Link to https://html.spec.whatwg.org/#the-foo-element where sensible

This makes it more apparent what e.g. HTMLModElement and
HTMLParagraphElement are.

These interfaces don't have good sections and are left alone:
HTMLDirectoryElement
HTMLFontElement
HTMLFrameElement
HTMLFrameSetElement
HTMLMarqueeElement (https://www.w3.org/Bugs/Public/show_bug.cgi?id=28296)

BUG=460722
NOTRY=true

Review URL: https://codereview.chromium.org/1022413002

git-svn-id: svn://svn.chromium.org/blink/trunk@192355 bbb929c8-8fbe-4397-9dbb-9b2b20218538
46 files changed
tree: fb1e3dafc19509c07b6a32498ab338e0010ada5d
  1. third_party/