diff --git a/api/peerconnectioninterface.h b/api/peerconnectioninterface.h
index a6c8c06335..f6fae5848c 100644
--- a/api/peerconnectioninterface.h
+++ b/api/peerconnectioninterface.h
@@ -886,10 +886,10 @@ class PeerConnectionInterface : public rtc::RefCountInterface {
     return false;
   }
 
-  // Register a metric observer (used by chromium).
-  //
-  // There can only be one observer at a time. Before the observer is
-  // destroyed, RegisterUMAOberver(nullptr) should be called.
+  // Register a metric observer (used by chromium). It's reference counted, and
+  // this method takes a reference. RegisterUMAObserver(nullptr) will release
+  // the reference.
+  // TODO(deadbeef): Take argument as scoped_refptr?
   virtual void RegisterUMAObserver(UMAObserver* observer) = 0;
 
   // 0 <= min <= current <= max should hold for set parameters.
diff --git a/pc/peerconnection.h b/pc/peerconnection.h
index d86f2975b3..705fff5001 100644
--- a/pc/peerconnection.h
+++ b/pc/peerconnection.h
@@ -922,7 +922,7 @@ class PeerConnection : public PeerConnectionInterface,
   // will refer to the same reference count.
   rtc::scoped_refptr<PeerConnectionFactory> factory_;
   PeerConnectionObserver* observer_ = nullptr;
-  UMAObserver* uma_observer_ = nullptr;
+  rtc::scoped_refptr<UMAObserver> uma_observer_ = nullptr;
 
   // The EventLog needs to outlive |call_| (and any other object that uses it).
   std::unique_ptr<RtcEventLog> event_log_;