Move the call to enable the WebRTC event log from PeerConnectionFactory to PeerConnection.

content/browser/media/webrtc/webrtc_eventlog_callback_handler.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_MEDIA_WEBRTC_WEBRTC_EVENTLOG_CALLBACK_HANDLER_H_
+#define CONTENT_BROWSER_MEDIA_WEBRTC_WEBRTC_EVENTLOG_CALLBACK_HANDLER_H_
+
+#include <vector>
+
+#include "base/callback.h"
+#include "base/files/file_path.h"
+#include "base/optional.h"
+
+namespace content {
+
+// This is a singleton class that is used to register callbacks that are used
+// for the WebRTC event log. The callbacks are used to signal when the eventlog
+// should be started and stopped, and other callbacks are used to signal when
+// PeerConnections are added or removed.
+class WebRTCEventLogCallbackHandler {
+ public:
+  WebRTCEventLogCallbackHandler();
+  ~WebRTCEventLogCallbackHandler();
+
+  // Register functions to handle starting and stopping the WebRTC event log
+  // functionality from the chrome://webrtc-internals page. Only one handler can
+  // be registered per render process.
+  using EventLogStartFunc = base::Callback<void(const base::FilePath&)>;
+  using EventLogStopFunc = base::Callback<void()>;
+  void RegisterEventLogHandler(const EventLogStartFunc& start_logging_callback,
+                               const EventLogStopFunc& stop_logging_callback);
+
+  // Register callback functions to receive calls when PeerConnections are
+  // added or removed. Multiple callbacks can be registered for each render
+  // process.
+  using PeerConnectionAddedFunc = base::Callback<void(int)>;
+  using PeerConnectionRemovedFunc = base::Callback<void(int)>;
+  void RegisterPeerConnectionCallbacks(
+      const PeerConnectionAddedFunc& pc_added_callback,
+      const PeerConnectionRemovedFunc& pc_removed_callback);
+
+  void StartEventLog(const base::FilePath& file_path);
+  void StopEventLog();
+
+  void PeerConnectionAdded(int connection_id);
+  void PeerConnectionRemoved(int connection_id);
+
+ private:
+  base::Optional<EventLogStartFunc> eventlog_start_fn_;
+  base::Optional<EventLogStopFunc> eventlog_stop_fn_;
+
+  std::vector<PeerConnectionAddedFunc> peerconnection_added_fn_;
+  std::vector<PeerConnectionRemovedFunc> peerconnection_removed_fn_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MEDIA_WEBRTC_WEBRTC_EVENTLOG_CALLBACK_HANDLER_H_