Fix null-dereference in r23716.

src/ic/ic.h

 // Copyright 2012 the V8 project 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 V8_IC_H_
 #define V8_IC_H_
 
 #include "src/macro-assembler.h"
 
 namespace v8 {
@@ skipping 828 matching lines @@
     OBJECT,        // JSObject
     KNOWN_OBJECT,  // JSObject with specific map (faster check)
     GENERIC
   };
 
   static State NewInputState(State old_state, Handle<Object> value);
 
   static Type* StateToType(Zone* zone, State state,
                            Handle<Map> map = Handle<Map>());
 
-  static void StubInfoToType(uint32_t stub_key, Type** left_type,
-                             Type** right_type, Type** overall_type,
-                             Handle<Map> map, Zone* zone);
-
   CompareIC(Isolate* isolate, Token::Value op)
       : IC(EXTRA_CALL_FRAME, isolate), op_(op) {}
 
   // Update the inline cache for the given operands.
   Code* UpdateCaches(Handle<Object> x, Handle<Object> y);
 
 
   // Factory method for getting an uninitialized compare stub.
   static Handle<Code> GetUninitialized(Isolate* isolate, Token::Value op);
 
@@ skipping 68 matching lines @@
 
 // Support functions for interceptor handlers.
 DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptorOnly);
 DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptor);
 DECLARE_RUNTIME_FUNCTION(LoadElementWithInterceptor);
 DECLARE_RUNTIME_FUNCTION(StorePropertyWithInterceptor);
 }
 }  // namespace v8::internal
 
 #endif  // V8_IC_H_