ios-finishAllCollaboration_iOSの全協業終了処理を実装

public_new/js/chat-ui.js

@@ -2637,7 +2637,7 @@ CHAT_UI.startCollaboration = function(collaborationType) {
             text: DATA_MESSAGE_SCHEME + FINISH_ALL_COLLABORATION_SIGNAL
         }, 0);
         if (CHAT_UTIL.isIOS()) {
-            //TODO ルーム全協業終了API
+            webkit.messageHandlers.finishAllCollaboration.postMessage({});
         } else if (CHAT_UTIL.isAndroid()) {
             android.finishAllCollaboration();
         }