first-paint and first-contentful paint

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

Index: third_party/WebKit/Source/core/timing/PerformanceBase.cpp
diff --git a/third_party/WebKit/Source/core/timing/PerformanceBase.cpp b/third_party/WebKit/Source/core/timing/PerformanceBase.cpp
index 660507eee11d03eae3d5bff86da2a268791a26b1..8c7244713aef76efb253000cf6bc1e43d65c364e 100644
--- a/third_party/WebKit/Source/core/timing/PerformanceBase.cpp
+++ b/third_party/WebKit/Source/core/timing/PerformanceBase.cpp
@@ -157,9 +157,11 @@ PerformanceEntryVector PerformanceBase::getEntriesByType(
       if (m_userTiming)
         entries.appendVector(m_userTiming->getMeasures());
       break;
-    // Unsupported for LongTask, TaskAttribution.
+    // Unsupported for Paint, LongTask, TaskAttribution.
     // Per the spec, these entries can only be accessed via
     // Performance Observer. No separate buffer is maintained.
+    case PerformanceEntry::Paint:
+      break;
     case PerformanceEntry::LongTask:
       break;
     case PerformanceEntry::TaskAttribution:
@@ -403,6 +405,24 @@ void PerformanceBase::addNavigationTiming(LocalFrame* frame) {
   notifyObserversOfEntry(*m_navigationTiming);
 }
 
+void PerformanceBase::addFirstPaintTiming(double startTime) {
+  addPaintTiming(PerformancePaintTiming::PaintType::FirstPaint, startTime);
+}
+
+void PerformanceBase::addFirstContentfulPaintTiming(double startTime) {
+  addPaintTiming(PerformancePaintTiming::PaintType::FirstContentfulPaint,
+                 startTime);
+}
+
+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);