Add proto files so we can run jscompile on remoting JS files.

BUG=
R=jamiewalch@chromium.org

Review URL: https://codereview.chromium.org/130423010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247466 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247466