[turbofan] Add RoundUint32ToFloat32 operator to Turbofan.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 1024f0a25dbafb0e7a3a5d5f8a3dfae2cf934a08..382ec43ca623b5a90d14b0b3756cd1f2ae29dba7 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -2225,6 +2225,11 @@ Type* Typer::Visitor::TypeRoundInt64ToFloat64(Node* node) {
 }
 
 
+Type* Typer::Visitor::TypeRoundUint32ToFloat32(Node* node) {
+  return Type::Intersect(Type::PlainNumber(), Type::UntaggedFloat32(), zone());
+}
+
+
 Type* Typer::Visitor::TypeRoundUint64ToFloat32(Node* node) {
   return Type::Intersect(Type::PlainNumber(), Type::UntaggedFloat32(), zone());
 }