Updates to Server-Timing in accordance with with spec changes

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"
 #include "platform/wtf/text/WTFString.h"
 
 namespace blink {
 
-PerformanceServerTiming::PerformanceServerTiming(const String& name,
-                                                 const String& metric,
-                                                 double duration,
-                                                 const String& description)
-    : PerformanceEntry(name, "server", 0.0, duration),
-      metric_(metric),
-      description_(description) {}
+PerformanceServerTiming::PerformanceServerTiming(const String& metric,
+                                                 double value,
+                                                 const String& description,
+                                                 bool allow_timing_details)
+    : metric_(metric),
+      value_(value),
+      description_(description),
+      allow_timing_details_(allow_timing_details) {}
 
 PerformanceServerTiming::~PerformanceServerTiming() {}
 
 String PerformanceServerTiming::metric() const {
   return metric_;
 }
 
+double PerformanceServerTiming::value() const {
+  return allow_timing_details_ ? value_ : 0.0;
+}
+
 String PerformanceServerTiming::description() const {
-  return description_;
+  return allow_timing_details_ ? description_ : "";
 }
 
 void PerformanceServerTiming::BuildJSONValue(V8ObjectBuilder& builder) const {
-  PerformanceEntry::BuildJSONValue(builder);
   builder.AddString("metric", metric());
+  builder.AddNumber("value", value());
   builder.AddString("description", description());
 }
 
 }  // namespace blink