Add MediaStreamSource frame rate calculation to the tracker.

content/browser/media/webrtc_internals.cc

Index: content/browser/media/webrtc_internals.cc
diff --git a/content/browser/media/webrtc_internals.cc b/content/browser/media/webrtc_internals.cc
index d8a0314466c3930839e820a09045db574754536c..48a46393ea99d8f71d1a86af5a1caf1df4156cb3 100644
--- a/content/browser/media/webrtc_internals.cc
+++ b/content/browser/media/webrtc_internals.cc
@@ -205,6 +205,22 @@ void WebRTCInternals::OnGetUserMedia(int rid,
     SendUpdate("addGetUserMedia", dict);
 }
 
+void WebRTCInternals::OnAddVideoStats(base::ProcessId pid,
+                                      const std::string& video_id,
+                                      float input_frame_rate,
+                                      int number_of_dropped_frames) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  base::DictionaryValue* dict = new base::DictionaryValue();
+  dict->SetInteger("pid", static_cast<int>(pid));
+  dict->SetString("video_id", video_id);
+  dict->SetDouble("input_frame_rate", input_frame_rate);
+  dict->SetInteger("number_of_dropped_frames", number_of_dropped_frames);
+
+  if (observers_.might_have_observers())
+    SendUpdate("addVideoStats", dict);
+}
+
 void WebRTCInternals::AddObserver(WebRTCInternalsUIObserver *observer) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   observers_.AddObserver(observer);