first-paint and first-contentful paint

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

+// 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.
+
+#include "core/timing/PerformancePaintTiming.h"
+
+#include "bindings/core/v8/V8ObjectBuilder.h"
+
+namespace blink {
+
+PerformancePaintTiming::PerformancePaintTiming(PaintType type, double startTime)
+    : PerformanceEntry(fromPaintTypeToString(type),
+                       "paint",
+                       startTime,
+                       startTime) {}
+
+PerformancePaintTiming::~PerformancePaintTiming() {}
+
+String PerformancePaintTiming::fromPaintTypeToString(PaintType type) {
+  switch (type) {
+    case PaintType::FirstPaint:
+      return "first-paint";
+    case PaintType::FirstContentfulPaint:
+      return "first-contentful-paint";
+  }
+  NOTREACHED();
+}
+
+void PerformancePaintTiming::buildJSONValue(V8ObjectBuilder& builder) const {

[panicker, 2016/11/29 22:21:15]

no need to override this ?

[sunjian, 2016/12/02 21:39:57]

Done.

+  PerformanceEntry::buildJSONValue(builder);
+}
+}  // namespace blink