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

content/browser/renderer_host/media/peer_connection_tracker_host.cc

Index: content/browser/renderer_host/media/peer_connection_tracker_host.cc
diff --git a/content/browser/renderer_host/media/peer_connection_tracker_host.cc b/content/browser/renderer_host/media/peer_connection_tracker_host.cc
index 12f6edc96d16c0f3bfc10dd9106a10ed6e527d70..84e3a1f2968d17716b82b48504bf22477c84c6c6 100644
--- a/content/browser/renderer_host/media/peer_connection_tracker_host.cc
+++ b/content/browser/renderer_host/media/peer_connection_tracker_host.cc
@@ -4,16 +4,19 @@
 #include "content/browser/renderer_host/media/peer_connection_tracker_host.h"
 
 #include "base/power_monitor/power_monitor.h"
+#include "content/browser/media/webrtc/webrtc_eventlog_host.h"
 #include "content/browser/media/webrtc/webrtc_internals.h"
+#include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/common/media/peer_connection_tracker_messages.h"
-#include "content/public/browser/render_process_host.h"
 
 namespace content {
 
-PeerConnectionTrackerHost::PeerConnectionTrackerHost(int render_process_id)
+PeerConnectionTrackerHost::PeerConnectionTrackerHost(
+    int render_process_id,
+    WebRTCEventLogHost* event_log_host)
     : BrowserMessageFilter(PeerConnectionTrackerMsgStart),
-      render_process_id_(render_process_id) {
-}
+      render_process_id_(render_process_id),
+      event_log_host_(event_log_host) {}

[tommi (sloooow) - chröme, 2016/05/30 15:37:16]

if the event_loc_host param must never be nullptr, please add a dcheck for that
here so that we can catch it at the source.

[Ivo-OOO until feb 6, 2016/05/31 08:18:30]

Good idea, added.

 
 bool PeerConnectionTrackerHost::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
@@ -71,10 +74,12 @@ void PeerConnectionTrackerHost::OnAddPeerConnection(
       info.url,
       info.rtc_configuration,
       info.constraints);
+  event_log_host_->PeerConnectionAdded(info.lid);
 }
 
 void PeerConnectionTrackerHost::OnRemovePeerConnection(int lid) {
   WebRTCInternals::GetInstance()->OnRemovePeerConnection(peer_pid(), lid);
+  event_log_host_->PeerConnectionRemoved(lid);
 }
 
 void PeerConnectionTrackerHost::OnUpdatePeerConnection(