Replace v8::Handle with v8::Local in core/testing/*

Source/core/testing/GCObservation.h

 /*
  * Copyright (C) 2013 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
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include <v8.h>
 
 namespace blink {
 
 class GCObservation final : public GarbageCollectedFinalized<GCObservation>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static GCObservation* create(v8::Handle<v8::Value> observedValue)
+    static GCObservation* create(v8::Local<v8::Value> observedValue)
     {
         return new GCObservation(observedValue);
     }
 
     // Caution: It is only feasible to determine whether an object was
     // "near death"; it may have been kept alive through a weak
     // handle. After reaching near-death, having been collected is the
     // common case.
     bool wasCollected() const { return m_collected; }
     void setWasCollected();
 
     DEFINE_INLINE_TRACE() { }
 
 private:
-    explicit GCObservation(v8::Handle<v8::Value>);
+    explicit GCObservation(v8::Local<v8::Value>);
 
     ScopedPersistent<v8::Value> m_observed;
     bool m_collected;
 };
 
 } // namespace blink
 
 #endif // GCObservation_h