Cleanup unnecessary duplication of runtime functions.

src/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 2487 matching lines @@
       AddIncrementCounter(isolate()->counters()->string_add_native());
 
       // Return the sequential string.
       Push(result);
     }
     if_sameencodingandsequential.Else();
     {
       // Fallback to the runtime to add the two strings.
       Add<HPushArguments>(left, right);
       Push(Add<HCallRuntime>(isolate()->factory()->empty_string(),
-                             Runtime::FunctionForId(Runtime::kStringAddRT), 2));
+                             Runtime::FunctionForId(Runtime::kStringAdd), 2));
     }
     if_sameencodingandsequential.End();
   }
   if_createcons.End();
 
   return Pop();
 }
 
 
 HValue* HGraphBuilder::BuildStringAdd(
@@ skipping 10979 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8