Revert "Convert UnaryOpStub to a HydrogenCodeStub"

src/hydrogen-instructions.cc

 // 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 3060 matching lines @@
 HType HCheckFunction::CalculateInferredType() {
   return value()->type();
 }
 
 
 HType HCheckHeapObject::CalculateInferredType() {
   return HType::NonPrimitive();
 }
 
 
-HType HCheckSmi::CalculateInferredType() {
-  return HType::Smi();
-}
-
-
 HType HPhi::CalculateInferredType() {
   HType result = HType::Uninitialized();
   for (int i = 0; i < OperandCount(); ++i) {
     HType current = OperandAt(i)->type();
     result = result.Combine(current);
   }
   return result;
 }
 
 
@@ skipping 795 matching lines @@
     case kBackingStore:
       if (!name_.is_null()) stream->Add(*String::cast(*name_)->ToCString());
       stream->Add("[backing-store]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal