以下のリンクを参考にlocalではrails5のチャットアプリを作成できました。
http://qiita.com/jnchito/items/aec75fab42804287d71b

herokuでも動作させようと思いいろいろやってみましたがうまくいきません。
1日かかっても検討がつかない為質問させていただきました。
何か助言をいただけないでしょうか。

herokuで追加でやったことは
・rediscloudをアドオンで追加
・/config/redis/cable.yml のproduction:urlをENV["REDISCLOUD_URL"]に変更（なんとなく）

chromeのnetworkでは以下のようなエラー

WebSocket connection to 'wss://rails5chatxxxx.herokuapp.com/cable' failed:
WebSocket is closed before the connection is established.

herokuのlogでは
アプリ起動時

2015-12-23T05:24:32.308667+00:00 app[web.1]: => Booting Puma
2015-12-23T05:24:32.308689+00:00 app[web.1]: => Rails 5.0.0.beta1 application starting in production on ttp://0.0.0.0:43766
2015-12-23T05:24:32.308690+00:00 app[web.1]: => Run rails server -h for more startup options
2015-12-23T05:24:32.308691+00:00 app[web.1]: => Ctrl-C to shutdown server
2015-12-23T05:24:32.380698+00:00 app[web.1]: DEPRECATION WARNING: serve_static_files is deprecated and will be removed in Rails 5.1.
2015-12-23T05:24:32.380702+00:00 app[web.1]: Please use public_file_server.enabled = true instead.
2015-12-23T05:24:32.380703+00:00 app[web.1]: (called from block in tsort_each at /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:228)
2015-12-23T05:24:32.864256+00:00 app[worker.1]: rake aborted!
2015-12-23T05:24:32.864271+00:00 app[worker.1]: Don't know how to build task 'jobs:work'
2015-12-23T05:24:32.864445+00:00 app[worker.1]:
2015-12-23T05:24:32.864465+00:00 app[worker.1]: (See full trace by running task with --trace)
2015-12-23T05:24:33.073776+00:00 heroku[web.1]: Process exited with status 143
2015-12-23T05:24:33.050125+00:00 app[web.1]: Puma 2.15.3 starting...
2015-12-23T05:24:33.050130+00:00 app[web.1]: * Min threads: 0, max threads: 16
2015-12-23T05:24:33.050131+00:00 app[web.1]: * Environment: production
2015-12-23T05:24:33.050132+00:00 app[web.1]: * Listening on tcp://0.0.0.0:43766
2015-12-23T05:24:33.598097+00:00 heroku[worker.1]: State changed from up to crashed
2015-12-23T05:24:33.577983+00:00 heroku[worker.1]: Process exited with status 1

その後以下の様なログが繰り返されます

2015-12-23T05:31:46.633164+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=GET path="/cable" host=rails5chatxxxx.herokuapp.com request_id=00ff5924-89b8-4fbc-b738-4ffa0bf84981 fwd="119.83.217.68" dyno=web.1 connect=1ms service=30001ms status=503 bytes=0
2015-12-23T05:32:07.671155+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=GET path="/cable" host=rails5chat.herokuapp.com request_id=b925dc28-e0b4-40ac-b0e2-79a4f142e6b0 fwd="119.83.217.68" dyno=web.1 connect=1ms service=30001ms status=503 bytes=0
2015-12-23T05:32:11.828813+00:00 app[web.1]: Started GET "/cable" for 119.83.217.68 at 2015-12-23 05:32:11 +0000
2015-12-23T05:32:11.831413+00:00 app[web.1]: Started GET "/cable/" [WebSocket] for 119.83.217.68 at 2015-12-23 05:32:11 +0000
2015-12-23T05:32:11.831491+00:00 app[web.1]: Request origin not allowed: ttps://rails5chatxxxx.herokuapp.com
2015-12-23T05:32:11.831555+00:00 app[web.1]: Finished "/cable/" [WebSocket] for 119.83.217.68 at 2015-12-23 05:32:11 +0000
2015-12-23T05:32:15.689969+00:00 app[web.1]: Started GET "/cable" for 119.83.217.68 at 2015-12-23 05:32:15 +0000
2015-12-23T05:32:15.693371+00:00 app[web.1]: Started GET "/cable/" [WebSocket] for 119.83.217.68 at 2015-12-23 05:32:15 +0000
2015-12-23T05:32:15.693418+00:00 app[web.1]: Request origin not allowed: ttps://rails5chatxxxx.herokuapp.com
2015-12-23T05:32:15.693490+00:00 app[web.1]: Finished "/cable/" [WebSocket] for 119.83.217.68 at 2015-12-23 05:32:15 +0000
2015-12-23T05:32:16.353150+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=GET path="/cable" host=rails5chatxxxx.herokuapp.com request_id=56c96769-e94b-49f2-bd45-d69fdb850058 fwd="119.83.217.68" dyno=web.1 connect=15ms service=30000ms status=503 bytes=0
2015-12-23T05:32:38.642087+00:00 app[web.1]: Started GET "/cable" for 119.83.217.68 at 2015-12-23 05:32:38 +0000
2015-12-23T05:32:38.644988+00:00 app[web.1]: Started GET "/cable/" [WebSocket] for 119.83.217.68 at 2015-12-23 05:32:38 +0000
2015-12-23T05:32:38.645033+00:00 app[web.1]: Request origin not allowed: ttps://rails5chatxxxx.herokuapp.com
2015-12-23T05:32:38.645078+00:00 app[web.1]: Finished "/cable/" [WebSocket] for 119.83.217.68 at 2015-12-23 05:32:38 +0000
2015-12-23T05:32:41.832172+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=GET path="/cable" host=rails5chatxxxx.herokuapp.com request_id=7027966d-1bf0-4624-ba92-1177c570a622 fwd="119.83.217.68" dyno=web.1 connect=0ms service=30001ms status=503 bytes=0
2015-12-23T05:32:45.285005+00:00 app[web.1]: Started GET "/cable" for 119.83.217.68 at 2015-12-23 05:32:45 +0000
2015-12-23T05:32:45.287925+00:00 app[web.1]: Started GET "/cable/" [WebSocket] for 119.83.217.68 at 2015-12-23 05:32:45 +0000
2015-12-23T05:32:45.287980+00:00 app[web.1]: Request origin not allowed: ttps://rails5chatxxxx.herokuapp.com
2015-12-23T05:32:45.288046+00:00 app[web.1]: Finished "/cable/" [WebSocket] for 119.83.217.68 at 2015-12-23 05:32:45 +0000
2015-12-23T05:32:45.717113+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=GET path="/cable" host=rails5chatxxxx.herokuapp.com request_id=8ef144f2-f5f4-4e2a-9ae2-0ca015df58f5 fwd="119.83.217.68" dyno=web.1 connect=0ms service=30000ms status=503 bytes=0

※httpをttpに変更してあります。