Enable ServerTiming support

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

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 47 matching lines @@
   enum EntryType : PerformanceEntryType {
     Invalid = 0,
     Navigation = 1 << 0,
     Composite = 1 << 1,
     Mark = 1 << 2,
     Measure = 1 << 3,
     Render = 1 << 4,
     Resource = 1 << 5,
     LongTask = 1 << 6,
     TaskAttribution = 1 << 7,
-    Paint = 1 << 8
+    Paint = 1 << 8,
+    Server = 1 << 9
   };
 
   String name() const;
   String entryType() const;
   DOMHighResTimeStamp startTime() const;
   // PerformanceNavigationTiming will override this due to
   // the nature of reporting it early, which means not having a
   // finish time available at construction time.
   // Other classes must NOT override this.
   virtual DOMHighResTimeStamp duration() const;
@@ skipping 28 matching lines @@
   const String m_name;
   const String m_entryType;
   const double m_startTime;
   const double m_duration;
   const PerformanceEntryType m_entryTypeEnum;
 };
 
 }  // namespace blink
 
 #endif  // PerformanceEntry_h