Clean up the Result class. Reduce the size of Result from four words...

src/ia32/register-allocator-ia32.cc

 // Copyright 2008 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 109 matching lines @@
   Use(esi);  // Context (callee's context on entry).
 }
 
 
 Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() {
   Result result = AllocateWithoutSpilling();
   // Check that the register is a byte register.  If not, unuse the
   // register if valid and return an invalid result.
   if (result.is_valid() && !result.reg().is_byte_register()) {
     result.Unuse();
-    return Result(cgen_);
+    return Result();
   }
   return result;
 }
 
 
 } }  // namespace v8::internal