First version of PerformanceObserver

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 24 matching lines @@
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ScriptState;
 class ScriptValue;
 
+using PerformanceEntryType = unsigned char;
+using PerformanceEntryTypeMask = unsigned char;
+
 class CORE_EXPORT PerformanceEntry : public GarbageCollectedFinalized<PerformanceEntry>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~PerformanceEntry();
 
+    enum EntryType {
+        Invalid = 0,
+        Composite = 1 << 1,
+        Mark = 1 << 2,
+        Measure = 1 << 3,
+        Render = 1 << 4,
+        Resource = 1 << 5,
+    };
+
     String name() const;
     String entryType() const;
     double startTime() const;
     double duration() const;
 
     ScriptValue toJSONForBinding(ScriptState*) const;
 
-    virtual bool isResource() { return false; }
-    virtual bool isRender() { return false; }
-    virtual bool isComposite() { return false; }
-    virtual bool isMark() { return false; }
-    virtual bool isMeasure() { return false; }
+    PerformanceEntryType entryTypeEnum() const { return m_entryTypeEnum; }
+
+    bool isResource() const { return m_entryTypeEnum == Resource; }
+    bool isRender()  const { return m_entryTypeEnum == Render; }
+    bool isComposite()  const { return m_entryTypeEnum == Composite; }
+    bool isMark()  const { return m_entryTypeEnum == Mark; }
+    bool isMeasure()  const { return m_entryTypeEnum == Measure; }
 
     static bool startTimeCompareLessThan(PerformanceEntry* a, PerformanceEntry* b)
     {
         return a->startTime() < b->startTime();
     }
 
+    static EntryType toEntryTypeEnum(const String& entryType);
+
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 
 protected:
     PerformanceEntry(const String& name, const String& entryType, double startTime, double finishTime);
 
 private:
     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