First version of PerformanceObserver

Source/core/timing/PerformanceObserverCallback.h

Index: Source/core/timing/PerformanceObserverCallback.h
diff --git a/Source/core/dom/MutationCallback.h b/Source/core/timing/PerformanceObserverCallback.h
similarity index 77%
copy from Source/core/dom/MutationCallback.h
copy to Source/core/timing/PerformanceObserverCallback.h
index 5bdfbfdaad15fa91535f5829281146fadfc62d9c..71e7f727fa495e493d77ac79bed53fe63079decc 100644
--- a/Source/core/dom/MutationCallback.h
+++ b/Source/core/timing/PerformanceObserverCallback.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011 Google Inc. All rights reserved.
+ * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -28,23 +28,23 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef MutationCallback_h
-#define MutationCallback_h
+#ifndef PerformanceObserverCallback_h
+#define PerformanceObserverCallback_h
 
 #include "platform/heap/Handle.h"
 #include "wtf/RefPtr.h"
-#include "wtf/Vector.h"
 
 namespace blink {
 
-class MutationRecord;
-class MutationObserver;
+class ExecutionContext;
+class PerformanceObserverEntryList;
+class PerformanceObserver;
 
-class MutationCallback : public NoBaseWillBeGarbageCollectedFinalized<MutationCallback> {
+class PerformanceObserverCallback : public GarbageCollectedFinalized<PerformanceObserverCallback> {
 public:
-    virtual ~MutationCallback() { }
+    virtual ~PerformanceObserverCallback() { }
 
-    virtual void call(const WillBeHeapVector<RefPtrWillBeMember<MutationRecord>>&, MutationObserver*) = 0;
+    virtual void handleEvent(PerformanceObserverEntryList*, PerformanceObserver*) = 0;
     virtual ExecutionContext* executionContext() const = 0;
 
     DEFINE_INLINE_VIRTUAL_TRACE() { }
@@ -52,4 +52,4 @@ public:
 
 }
 
-#endif // MutationCallback_h
+#endif // PerformanceObserverCallback_h