FirstMeaningfulPaint UMA

third_party/WebKit/Source/core/timing/PerformanceTiming.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 74 matching lines @@
     unsigned long long firstLayout() const;
     // The time the first paint operation was performed.
     unsigned long long firstPaint() const;
     // The time the first paint operation for visible text was performed.
     unsigned long long firstTextPaint() const;
     // The time the first paint operation for image was performed.
     unsigned long long firstImagePaint() const;
     // The time of the first 'contentful' paint. A contentful paint is a paint
     // that includes content of some kind (for example, text or image content).
     unsigned long long firstContentfulPaint() const;
+    // The time of the first 'meaningful' paint, A meaningful paint is a paint
+    // where the page's primary content is visible.
+    unsigned long long firstMeaningfulPaint() const;
 
     unsigned long long parseStart() const;
     unsigned long long parseStop() const;
     unsigned long long parseBlockedOnScriptLoadDuration() const;
     unsigned long long parseBlockedOnScriptLoadFromDocumentWriteDuration() const;
 
     ScriptValue toJSONForBinding(ScriptState*) const;
 
     DECLARE_VIRTUAL_TRACE();
 
     unsigned long long monotonicTimeToIntegerMilliseconds(double) const;
     double integerMillisecondsToMonotonicTime(unsigned long long) const;
 
 private:
     explicit PerformanceTiming(LocalFrame*);
 
     const DocumentTiming* documentTiming() const;
     const DocumentParserTiming* documentParserTiming() const;
     const PaintTiming* paintTiming() const;
     DocumentLoader* documentLoader() const;
     DocumentLoadTiming* documentLoadTiming() const;
     ResourceLoadTiming* resourceLoadTiming() const;
 };
 
 } // namespace blink
 
 #endif // PerformanceTiming_h