Add subresource filter page load metrics observer

chrome/browser/page_load_metrics/page_load_tracker.cc

Index: chrome/browser/page_load_metrics/page_load_tracker.cc
diff --git a/chrome/browser/page_load_metrics/page_load_tracker.cc b/chrome/browser/page_load_metrics/page_load_tracker.cc
index 6f161e9fa3d7913d4eba92157bb0c03939b0b0c4..9e0854b9b0a6dac2cb0e35742a7f997730afae0f 100644
--- a/chrome/browser/page_load_metrics/page_load_tracker.cc
+++ b/chrome/browser/page_load_metrics/page_load_tracker.cc
@@ -256,6 +256,8 @@ void DispatchObserverTimingCallbacks(PageLoadMetricsObserver* observer,
                                      const PageLoadExtraInfo& extra_info) {
   if (last_timing != new_timing)
     observer->OnTimingUpdate(new_timing, extra_info);
+  if (extra_info.metadata.behavior_flags != last_metadata.behavior_flags)

[Charlie Harrison, 2017/02/09 19:19:13]

Why not pull this above OnTimingUpdate too? 

[Bryan McQuade, 2017/02/09 19:30:49]

done

+    observer->OnLoadingBehaviorObserved(extra_info);
   if (new_timing.dom_content_loaded_event_start &&
       !last_timing.dom_content_loaded_event_start)
     observer->OnDomContentLoadedEventStart(new_timing, extra_info);
@@ -277,8 +279,6 @@ void DispatchObserverTimingCallbacks(PageLoadMetricsObserver* observer,
     observer->OnParseStart(new_timing, extra_info);
   if (new_timing.parse_stop && !last_timing.parse_stop)
     observer->OnParseStop(new_timing, extra_info);
-  if (extra_info.metadata.behavior_flags != last_metadata.behavior_flags)
-    observer->OnLoadingBehaviorObserved(extra_info);
 }
 
 }  // namespace