Start and stop RTC event logs from private extension API.

chrome/browser/resources/hangout_services/thunk.js

Index: chrome/browser/resources/hangout_services/thunk.js
diff --git a/chrome/browser/resources/hangout_services/thunk.js b/chrome/browser/resources/hangout_services/thunk.js
index db1500699075e443f08832d10c624a107c05bacb..ef44a26863df2c99054112daaee51c34ff509b72 100644
--- a/chrome/browser/resources/hangout_services/thunk.js
+++ b/chrome/browser/resources/hangout_services/thunk.js
@@ -172,7 +172,17 @@ chrome.runtime.onMessageExternal.addListener(
           chrome.webrtcLoggingPrivate.stopAudioDebugRecordings(
               requestInfo, origin, doSendResponse);
           return true;
+        } else if (method == 'logging.startWebRtcEventLogging') {
+          var seconds = message['seconds'] || 0;
+          chrome.webrtcLoggingPrivate.startWebRtcEventLogging(
+              requestInfo, origin, seconds, doSendResponse);
+          return true;
+        } else if (method == 'logging.stopWebRtcEventLogging') {
+          chrome.webrtcLoggingPrivate.stopWebRtcEventLogging(
+              requestInfo, origin, doSendResponse);
+          return true;
         }
+
         throw new Error('Unknown method: ' + method);
       } catch (e) {
         doSendResponse(null, e.name + ': ' + e.message);