Make HValue::ActualValue() traverse all idefs.

src/hydrogen-alias-analysis.h

 // Copyright 2013 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 70 matching lines @@
     return Query(a, b) != kNoAlias;
   }
 
   inline bool MustAlias(HValue* a, HValue* b) {
     return Query(a, b) == kMustAlias;
   }
 
   inline bool NoAlias(HValue* a, HValue* b) {
     return Query(a, b) == kNoAlias;
   }
-
-  // Returns the actual value of an instruction. In the case of a chain
-  // of informative definitions, return the root of the chain.
-  HValue* ActualValue(HValue* obj) {
-    while (obj->IsInformativeDefinition()) {  // Walk a chain of idefs.
-      obj = obj->RedefinedOperand();
-    }
-    return obj;
-  }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_ALIAS_ANALYSIS_H_