first-paint and first-contentful paint

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

+// Copyright 2016 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.
+
+#ifndef PerformancePaintTiming_h
+#define PerformancePaintTiming_h
+
+#include "core/CoreExport.h"
+#include "core/timing/PerformanceEntry.h"
+
+namespace blink {
+
+class CORE_EXPORT PerformancePaintTiming final : public PerformanceEntry {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  enum class PaintType { FirstPaint, FirstContentfulPaint };
+
+  PerformancePaintTiming(PaintType, double startTime);
+  ~PerformancePaintTiming() override;
+
+  static String fromPaintTypeToString(PaintType);
+};
+}  // namespace blink
+
+#endif  // PerformancePaintTiming_h