Convert PatchCache (and related methods) to use types rather than objects/maps.

src/list.h

 // Copyright 2011 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 179 matching lines @@
   // non-inlined versions of ResizeAdd.
   void ResizeAddInternal(const T& element, AllocationPolicy allocator);
 
   // Resize the list.
   void Resize(int new_capacity, AllocationPolicy allocator);
 
   DISALLOW_COPY_AND_ASSIGN(List);
 };
 
 class Map;
+class Type;
 class Code;
 template<typename T> class Handle;
 typedef List<Map*> MapList;
 typedef List<Code*> CodeList;
 typedef List<Handle<Map> > MapHandleList;
+typedef List<Handle<Type> > TypeHandleList;
 typedef List<Handle<Code> > CodeHandleList;
 
 // Perform binary search for an element in an already sorted
 // list. Returns the index of the element of -1 if it was not found.
 // |cmp| is a predicate that takes a pointer to an element of the List
 // and returns +1 if it is greater, -1 if it is less than the element
 // being searched.
 template <typename T, class P>
 int SortedListBSearch(const List<T>& list, P cmp);
 template <typename T>
 int SortedListBSearch(const List<T>& list, T elem);
 
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_LIST_H_