Get rid of the unused native code StringAddStub.

src/code-stubs-hydrogen.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 982 matching lines @@
                               state.fixed_right_arg(), allocation_mode);
 }
 
 
 Handle<Code> BinaryOpWithAllocationSiteStub::GenerateCode(Isolate* isolate) {
   return DoGenerateCode(isolate, this);
 }
 
 
 template <>
-HValue* CodeStubGraphBuilder<NewStringAddStub>::BuildCodeInitializedStub() {
-  NewStringAddStub* stub = casted_stub();
+HValue* CodeStubGraphBuilder<StringAddStub>::BuildCodeInitializedStub() {
+  StringAddStub* stub = casted_stub();
   StringAddFlags flags = stub->flags();
   PretenureFlag pretenure_flag = stub->pretenure_flag();
 
-  HValue* left = GetParameter(NewStringAddStub::kLeft);
-  HValue* right = GetParameter(NewStringAddStub::kRight);
+  HValue* left = GetParameter(StringAddStub::kLeft);
+  HValue* right = GetParameter(StringAddStub::kRight);
 
   // Make sure that both arguments are strings if not known in advance.
   if ((flags & STRING_ADD_CHECK_LEFT) == STRING_ADD_CHECK_LEFT) {
     left = BuildCheckString(left);
   }
   if ((flags & STRING_ADD_CHECK_RIGHT) == STRING_ADD_CHECK_RIGHT) {
     right = BuildCheckString(right);
   }
 
   return BuildStringAdd(left, right, HAllocationMode(pretenure_flag));
 }
 
 
-Handle<Code> NewStringAddStub::GenerateCode(Isolate* isolate) {
+Handle<Code> StringAddStub::GenerateCode(Isolate* isolate) {
   return DoGenerateCode(isolate, this);
 }
 
 
 template <>
 HValue* CodeStubGraphBuilder<ToBooleanStub>::BuildCodeInitializedStub() {
   ToBooleanStub* stub = casted_stub();
 
   IfBuilder if_true(this);
   if_true.If<HBranch>(GetParameter(0), stub->GetTypes());
@@ skipping 305 matching lines @@
   return BuildUncheckedDictionaryElementLoad(receiver, key);
 }
 
 
 Handle<Code> KeyedLoadDictionaryElementStub::GenerateCode(Isolate* isolate) {
   return DoGenerateCode(isolate, this);
 }
 
 
 } }  // namespace v8::internal