[runtime] TailCallRuntime and CallRuntime should use default argument counts

src/crankshaft/x64/lithium-codegen-x64.h

Index: src/crankshaft/x64/lithium-codegen-x64.h
diff --git a/src/crankshaft/x64/lithium-codegen-x64.h b/src/crankshaft/x64/lithium-codegen-x64.h
index dbd555641cd26eaa5eeafd6b14d1e41aaf9be449..6fb918bf84dd33db373a76f16c0781bb9ae02f8a 100644
--- a/src/crankshaft/x64/lithium-codegen-x64.h
+++ b/src/crankshaft/x64/lithium-codegen-x64.h
@@ -176,6 +176,11 @@ class LCodeGen: public LCodeGenBase {
     CallRuntime(function, num_arguments, instr);
   }
 
+  void CallRuntime(Runtime::FunctionId id, LInstruction* instr) {
+    const Runtime::Function* function = Runtime::FunctionForId(id);
+    CallRuntime(function, function->nargs, instr);
+  }
+
   void CallRuntimeFromDeferred(Runtime::FunctionId id,
                                int argc,
                                LInstruction* instr,