Implement invalidation tracking in devtools

Source/platform/TracedValue.h

 // Copyright 2014 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.
 
 #ifndef TracedValue_h
 #define TracedValue_h
 
 #include "platform/EventTracer.h"
 
 #include "wtf/PassRefPtr.h"
@@ skipping 10 matching lines @@
 public:
     static PassRefPtr<TracedValue> create();
 
     void endDictionary();
     void endArray();
 
     void setInteger(const char* name, int value);
     void setDouble(const char* name, double);
     void setBoolean(const char* name, bool value);
     void setString(const char* name, const String& value);
+    void setArray(const char* name, PassRefPtr<JSONArray> value);
     void beginArray(const char* name);
     void beginDictionary(const char* name);
 
     void pushInteger(int);
     void pushDouble(double);
     void pushBoolean(bool);
     void pushString(const String&);
     void beginArray();
     void beginDictionary();
 
     virtual String asTraceFormat() const override;
 
 private:
     TracedValue();
     virtual ~TracedValue();
 
     JSONObject* currentDictionary() const;
     JSONArray* currentArray() const;
 
     Vector<RefPtr<JSONValue> > m_stack;
 };
 
 } // namespace blink
 
 #endif // TracedValue_h