| Index: src/runtime/runtime-strings.cc
 | 
| diff --git a/src/runtime/runtime-strings.cc b/src/runtime/runtime-strings.cc
 | 
| index 89b0d2bfa8fe08e430a19f65397f0d15a46604f7..09d2b47a9ac1181b9ceac1a25047c8fe6fdd54c8 100644
 | 
| --- a/src/runtime/runtime-strings.cc
 | 
| +++ b/src/runtime/runtime-strings.cc
 | 
| @@ -1301,5 +1301,13 @@ RUNTIME_FUNCTION(Runtime_IsStringWrapperSafeForDefaultValueOf) {
 | 
|    UNIMPLEMENTED();
 | 
|    return NULL;
 | 
|  }
 | 
| +
 | 
| +
 | 
| +RUNTIME_FUNCTION(Runtime_StringLength) {
 | 
| +  HandleScope scope(isolate);
 | 
| +  DCHECK(args.length() == 1);
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| +  CONVERT_ARG_HANDLE_CHECKED(String, s, 0);
 | 
| +  return Smi::FromInt(s->length());
 | 
| +}
 | 
|  }
 | 
|  }  // namespace v8::internal
 | 
| 
 |