Use std::unique_ptr for base::DictionaryValue and base::ListValue's internal store.

content/browser/media/webrtc/webrtc_internals.cc

Index: content/browser/media/webrtc/webrtc_internals.cc
diff --git a/content/browser/media/webrtc/webrtc_internals.cc b/content/browser/media/webrtc/webrtc_internals.cc
index 09d7a970d26052e49cedf927f7bf87711bfb1c1a..29fbbb5be547d818c98dba49ba8fd9da47ed1673 100644
--- a/content/browser/media/webrtc/webrtc_internals.cc
+++ b/content/browser/media/webrtc/webrtc_internals.cc
@@ -263,10 +263,8 @@ void WebRTCInternals::UpdateObserver(WebRTCInternalsUIObserver* observer) {
   if (peer_connection_data_.GetSize() > 0)
     observer->OnUpdate("updateAllPeerConnections", &peer_connection_data_);
 
-  for (base::ListValue::iterator it = get_user_media_requests_.begin();
-       it != get_user_media_requests_.end();
-       ++it) {
-    observer->OnUpdate("addGetUserMedia", *it);
+  for (const auto& request : get_user_media_requests_) {
+    observer->OnUpdate("addGetUserMedia", request.get());
   }
 }