Make Logger::SuspectReadEvent extract the class name from the object.

src/log.h

 // Copyright 2006-2008 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 116 matching lines @@
   static void DeleteEvent(const char* name, void* object);
 
   // Emits an event with a tag, and some resource usage information.
   // -> (name, tag, <rusage information>).
   // Currently, the resource usage information is a process time stamp
   // and a real time timestamp.
   static void ResourceEvent(const char* name, const char* tag);
 
   // Emits an event that an undefined property was read from an
   // object.
-  static void SuspectReadEvent(String* name, String* obj);
+  static void SuspectReadEvent(String* name, Object* obj);
 
   // Emits an event when a message is put on or read from a debugging queue.
   // DebugTag lets us put a call-site specific label on the event.
   static void DebugTag(const char* call_site_tag);
   static void DebugEvent(const char* event_type, Vector<uint16_t> parameter);
 
 
   // ==== Events logged by --log-api. ====
   static void ApiNamedSecurityCheck(Object* key);
   static void ApiIndexedSecurityCheck(uint32_t index);
@@ skipping 88 matching lines @@
   friend class Profiler;
   friend class SlidingStateWindow;
   friend class VMState;
 #endif
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LOG_H_