Refactoring: HashMap: provide a pointer match function, so users don't need to.

src/debug.h

 // Copyright 2012 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 157 matching lines @@
 };
 
 
 // Cache of all script objects in the heap. When a script is added a weak handle
 // to it is created and that weak handle is stored in the cache. The weak handle
 // callback takes care of removing the script from the cache. The key used in
 // the cache is the script id.
 class ScriptCache : private HashMap {
  public:
   explicit ScriptCache(Isolate* isolate)
-    : HashMap(ScriptMatch), isolate_(isolate), collected_scripts_(10) {}
+      : HashMap(HashMap::PointersMatch),
+        isolate_(isolate),
+        collected_scripts_(10) {}
   virtual ~ScriptCache() { Clear(); }
 
   // Add script to the cache.
   void Add(Handle<Script> script);
 
   // Return the scripts in the cache.
   Handle<FixedArray> GetScripts();
 
   // Generate debugger events for collected scripts.
   void ProcessCollectedScripts();
 
  private:
   // Calculate the hash value from the key (script id).
   static uint32_t Hash(int key) {
     return ComputeIntegerHash(key, v8::internal::kZeroHashSeed);
   }
 
-  // Scripts match if their keys (script id) match.
-  static bool ScriptMatch(void* key1, void* key2) { return key1 == key2; }
-
   // Clear the cache releasing all the weak handles.
   void Clear();
 
   // Weak handle callback for scripts in the cache.
   static void HandleWeakScript(
       const v8::WeakCallbackData<v8::Value, void>& data);
 
   Isolate* isolate_;
   // List used during GC to temporarily store id's of collected scripts.
   List<int> collected_scripts_;
@@ skipping 850 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(MessageDispatchHelperThread);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 #endif  // V8_DEBUG_H_