[turbofan] Unify the PlainPrimitive as Number treatment.

src/compiler/simplified-operator.h

Index: src/compiler/simplified-operator.h
diff --git a/src/compiler/simplified-operator.h b/src/compiler/simplified-operator.h
index e8c82e3e9f81e89d3a9fb69c1683522c6eddfcec..f4a3cb9bfe0a6f7f53dad58337ed39e18520ff0d 100644
--- a/src/compiler/simplified-operator.h
+++ b/src/compiler/simplified-operator.h
@@ -154,11 +154,13 @@ class SimplifiedOperatorBuilder final : public ZoneObject {
   const Operator* NumberClz32();
   const Operator* NumberCeil();
   const Operator* NumberFloor();
+  const Operator* NumberFround();
   const Operator* NumberAtan();
   const Operator* NumberAtan2();
   const Operator* NumberLog();
   const Operator* NumberLog1p();
   const Operator* NumberRound();
+  const Operator* NumberSqrt();
   const Operator* NumberTrunc();
   const Operator* NumberToInt32();
   const Operator* NumberToUint32();