first-paint and first-contentful paint

third_party/WebKit/Source/core/timing/PerformanceBase.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 85 matching lines @@
 
 PerformanceEntryVector PerformanceBase::getEntriesByType(
     const String& entryType) {
   PerformanceEntryVector entries;
   PerformanceEntry::EntryType type =
       PerformanceEntry::toEntryTypeEnum(entryType);
 
   switch (type) {
     case PerformanceEntry::Invalid:
       return entries;
+    case PerformanceEntry::Paint:

[panicker, 2016/12/05 20:51:23]

Nit: add another comment here instead of adding to list below.

[sunjian, 2016/12/07 21:55:44]

Done.

     case PerformanceEntry::LongTask:
-      // Unsupported for LongTask. Per the spec, Long task entries can only be
-      // accessed via Performance Observer. No separate buffer is maintained.
+      // Unsupported for LongTask or Paint. Per the spec, Long task entries and
+      // Paint entries can only be accessed via Performance Observer.
+      // No separate buffer is maintained.
       return entries;
     case PerformanceEntry::Resource:
       for (const auto& resource : m_resourceTimingBuffer)
         entries.append(resource);
       break;
     case PerformanceEntry::Navigation:
       if (m_navigationTiming)
         entries.append(m_navigationTiming);
       break;
     case PerformanceEntry::Composite:
@@ skipping 229 matching lines @@
       documentLoader->getNavigationType(), documentLoadTiming.redirectStart(),
       documentLoadTiming.redirectEnd(), documentLoadTiming.fetchStart(),
       documentLoadTiming.responseEnd(),
       documentLoadTiming.hasCrossOriginRedirect(),
       documentLoadTiming.hasSameOriginAsPreviousDocument(), resourceLoadTiming,
       lastRedirectEndTime, finishTime, transferSize, encodedBodyLength,
       decodedBodyLength, didReuseConnection);
   notifyObserversOfEntry(*m_navigationTiming);
 }
 
+void PerformanceBase::addPaintTiming(PerformancePaintTiming::PaintType type,
+                                     double startTime) {
+  if (!RuntimeEnabledFeatures::performancePaintTimingEnabled())
+    return;
+  PerformanceEntry* entry = new PerformancePaintTiming(
+      type, monotonicTimeToDOMHighResTimeStamp(startTime));
+  notifyObserversOfEntry(*entry);
+}
+
 void PerformanceBase::addResourceTimingBuffer(PerformanceEntry& entry) {
   m_resourceTimingBuffer.append(&entry);
 
   if (isResourceTimingBufferFull()) {
     dispatchEvent(Event::create(EventTypeNames::resourcetimingbufferfull));
     dispatchEvent(
         Event::create(EventTypeNames::webkitresourcetimingbufferfull));
   }
 }
 
@@ skipping 164 matching lines @@
   visitor->trace(m_resourceTimingBuffer);
   visitor->trace(m_navigationTiming);
   visitor->trace(m_userTiming);
   visitor->trace(m_observers);
   visitor->trace(m_activeObservers);
   visitor->trace(m_suspendedObservers);
   EventTargetWithInlineData::trace(visitor);
 }
 
 }  // namespace blink