Add back interface checking over XPathExpression interface.

Mistakenly removed by r194504, re-add.

R=haraken
BUG=481813

Review URL: https://codereview.chromium.org/1108903003

git-svn-id: svn://svn.chromium.org/blink/trunk@194588 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed
tree: 4991a378baeb852299bfade545b3fa7445a33f17
  1. third_party/