DevTools: [JsDoc] Add @this annotations to bound functions without a pre-existing JsDoc

The closure compiler does not check access to members in functions that do not
have a [possibly empty] JsDoc at all. As such, this may result in errors in
non-annotated bound nested functions.

This patch modifies RequiredThisAnnotationCheck to require
the @this annotation for all nested functions using |this|,
adds the required annotations and fixes detected code errors.

R=eustas@chromium.org, aandrey, eustas, sergeyv, vsevik

Review URL: https://codereview.chromium.org/113423006

git-svn-id: svn://svn.chromium.org/blink/trunk@163946 bbb929c8-8fbe-4397-9dbb-9b2b20218538