This change cleans up all lint errors reported by gjslint,
with the exception of third-party code in the gr-linked-text
element and everything under bower_components:
$ gjslint --custom_jsdoc_tags event --check_html \
-e bower_components,gr-linked-text -r app
Skipping 577 file(s).
181 files checked, no errors found.
Change-Id: I080d58bdd33b2d4b8dd22a717f06eebd7bbfb63d