Move media directory under cast

ext/src/shim/cast/index.ts

@@ -24,13 +24,12 @@ import { AutoJoinPolicy
        , SessionStatus
        , VolumeControlType } from "./enums";
 
+import media from "./media";
 
 import { requestSession as requestSessionTimeout } from "../timeout";
-
 import { onMessage, sendMessageResponse } from "../messageBridge";
 
 
-
 type ReceiverActionListener = (
         receiver: Receiver
       , receiverAction: typeof ReceiverAction) => void;
@@ -68,6 +67,9 @@ export default {
   , isAvailable: false
   , timeout: new Timeout()
 
+    // chrome.cast.media namespace
+  , media
+
 
   , addReceiverActionListener: (
             listener: ReceiverActionListener): void => {