Enable ServerTiming support

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

+// Copyright 2017 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/PerformanceServerTiming.h"
+
+#include "bindings/core/v8/V8ObjectBuilder.h"
+#include "core/timing/PerformanceBase.h"
+
+namespace blink {
+
+PerformanceServerTiming::PerformanceServerTiming(const String& name,
+                                                 const String& metric,
+                                                 double duration,
+                                                 const String& description)
+    : PerformanceEntry(name, "server", 0.0, duration),
+      m_metric(metric),
+      m_description(description) {}
+
+PerformanceServerTiming::~PerformanceServerTiming() {}
+
+String PerformanceServerTiming::metric() const {
+  return m_metric;
+}
+
+String PerformanceServerTiming::description() const {
+  return m_description;
+}
+
+void PerformanceServerTiming::buildJSONValue(V8ObjectBuilder& builder) const {
+  PerformanceEntry::buildJSONValue(builder);
+  builder.addString("metric", metric());
+  builder.addString("description", description());
+}
+
+}  // namespace blink