[es6] Implement spec compliant ToPrimitive in the runtime.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index b34cbf1d85dadc24e3b4894b514b3fa8432fbaa3..039268dcbc8325d7c640571f04167e20ddf76047 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -3413,7 +3413,7 @@ void ToNumberStub::Generate(MacroAssembler* masm) {
   __ bind(&not_oddball);
 
   __ push(a0);  // Push argument.
-  __ InvokeBuiltin(Context::TO_NUMBER_BUILTIN_INDEX, JUMP_FUNCTION);
+  __ TailCallRuntime(Runtime::kToNumber, 1, 1);
 }