Use Type in CheckPrototypes.

src/ic.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 147 matching lines @@
     return state == UNINITIALIZED || state == PREMONOMORPHIC;
   }
 
   // Utility functions to convert maps to types and back. There are two special
   // cases:
   // - The heap_number_map is used as a marker which includes heap numbers as
   //   well as smis.
   // - The oddball map is only used for booleans.
   static Handle<Map> TypeToMap(Type* type, Isolate* isolate);
   static Type* MapToType(Handle<Map> type);
+  static Handle<Type> CurrentTypeOf(Handle<Object> object, Isolate* isolate);
 
  protected:
   // Get the call-site target; used for determining the state.
   Handle<Code> target() const { return target_; }
 
   Address fp() const { return fp_; }
   Address pc() const { return *pc_address_; }
   Isolate* isolate() const { return isolate_; }
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
@@ skipping 732 matching lines @@
 DECLARE_RUNTIME_FUNCTION(MaybeObject*, KeyedCallIC_MissFromStubFailure);
 DECLARE_RUNTIME_FUNCTION(MaybeObject*, ElementsTransitionAndStoreIC_Miss);
 DECLARE_RUNTIME_FUNCTION(MaybeObject*, BinaryOpIC_Miss);
 DECLARE_RUNTIME_FUNCTION(MaybeObject*, CompareNilIC_Miss);
 DECLARE_RUNTIME_FUNCTION(MaybeObject*, ToBooleanIC_Miss);
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_H_