Renamed the method and variable name in derived class so that the method in based class will not be overridden. 

BUG=270888

Review URL: https://codereview.chromium.org/51113006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233440 0039d316-1c4b-4281-b951-d872f2087c98
Fix flaky brailleDisplayPrivateApi tests and reenable them.

BUG=314181
R=dmazzoni@chromium.org

Review URL: https://codereview.chromium.org/56533004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233441 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233441