commit dc1e9e51df9ef1b02bc0b9045c5fe2a64fc3b79f
author tkent <tkent@chromium.org> Wed Dec 16 05:36:27 2015
committer Commit bot <commit-bot@chromium.org> Wed Dec 16 05:38:20 2015
tree 54b470293f712eae1abe2635e6d1b213288592c8
parent e1543ddc1e3cfeb3019cdda3357240727975d9d5

Add two UseCounters for form.imageName and form.elements.imageName.

https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/DPFNigRT6Dc/5ck9egACBAAJ
>  A) What the specification defines; form.imageName where |imageName| is a
>  descendant of |form|.
>
>  B) What the specification lacks, and all browsers agree; form.imageName where
>  |imageName| is not a descendant of |form| and is associated by HTML parser.
>
>  C) WebKit-only quirk:  form.elements.imageName

This CL adds
  UseCounter::FormNameAccessForNonDescendantImageElement for B.
  UseCounter::FormControlsCollectionNameAccessForImageElement for C.

BUG=570151

Review URL: https://codereview.chromium.org/1529033002

Cr-Commit-Position: refs/heads/master@{#365468}