Reland "Allocation site support for monomorphic StringAdds in BinaryOps".

src/type-info.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 94 matching lines @@
   // of various cycles in our headers. Death to tons of implementations in
   // headers!! :-P
   byte ToBooleanTypes(TypeFeedbackId id);
 
   // Get type information for arithmetic operations and compares.
   void BinaryType(TypeFeedbackId id,
                   Handle<Type>* left,
                   Handle<Type>* right,
                   Handle<Type>* result,
                   Maybe<int>* fixed_right_arg,
+                  Handle<AllocationSite>* allocation_site,
                   Token::Value operation);
 
   void CompareType(TypeFeedbackId id,
                    Handle<Type>* left,
                    Handle<Type>* right,
                    Handle<Type>* combined);
 
   Handle<Type> CountType(TypeFeedbackId id);
 
   Zone* zone() const { return zone_; }
@@ skipping 28 matching lines @@
   Isolate* isolate_;
   Zone* zone_;
   Handle<UnseededNumberDictionary> dictionary_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPE_INFO_H_