FirstMeaningfulPaint UMA

chrome/browser/page_load_metrics/metrics_web_contents_observer.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/page_load_metrics/metrics_web_contents_observer.h"
 
 #include <algorithm>
 #include <ostream>
 #include <string>
 #include <utility>
@@ skipping 158 matching lines @@
     return false;
   }
 
   if (!EventsInOrder(timing.first_paint, timing.first_contentful_paint)) {
     NOTREACHED() << "Invalid first_paint " << timing.first_paint
                  << " for first_contentful_paint "
                  << timing.first_contentful_paint;
     return false;
   }
 
+  if (!EventsInOrder(timing.first_paint, timing.first_meaningful_paint)) {
+    NOTREACHED() << "Invalid first_paint " << timing.first_paint
+                 << " for first_meaningful_paint "
+                 << timing.first_meaningful_paint;
+    return false;
+  }
+
   return true;
 }
 
 void RecordInternalError(InternalErrorLoadEvent event) {
   UMA_HISTOGRAM_ENUMERATION(internal::kErrorEvents, event, ERR_LAST_ENTRY);
 }
 
 void RecordAppBackgroundPageLoadCompleted(bool completed_after_background) {
   UMA_HISTOGRAM_BOOLEAN(internal::kPageLoadCompletedAfterAppBackground,
                         completed_after_background);
@@ skipping 39 matching lines @@
   if (new_timing.first_layout && !last_timing.first_layout)
     observer->OnFirstLayout(new_timing, extra_info);
   if (new_timing.first_paint && !last_timing.first_paint)
     observer->OnFirstPaint(new_timing, extra_info);
   if (new_timing.first_text_paint && !last_timing.first_text_paint)
     observer->OnFirstTextPaint(new_timing, extra_info);
   if (new_timing.first_image_paint && !last_timing.first_image_paint)
     observer->OnFirstImagePaint(new_timing, extra_info);
   if (new_timing.first_contentful_paint && !last_timing.first_contentful_paint)
     observer->OnFirstContentfulPaint(new_timing, extra_info);
+  if (new_timing.first_meaningful_paint && !last_timing.first_meaningful_paint)
+    observer->OnFirstMeaningfulPaint(new_timing, extra_info);
   if (new_timing.parse_start && !last_timing.parse_start)
     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
 
@@ skipping 748 matching lines @@
     if (navigation_handle->IsSamePage() || navigation_handle->IsErrorPage())
       return false;
     const std::string& mime_type = web_contents()->GetContentsMimeType();
     if (mime_type != "text/html" && mime_type != "application/xhtml+xml")
       return false;
   }
   return true;
 }
 
 }  // namespace page_load_metrics