[turbofan] Added the optional Float64RoundUp 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 4dbf4a488851738d1b50fbac823a4a1b4b7a2f9b..8051784562b0a48543d2f5f4ac5fcf67e196ff75 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -2234,6 +2234,12 @@ Type* Typer::Visitor::TypeFloat64RoundDown(Node* node) {
 }
 
 
+Type* Typer::Visitor::TypeFloat64RoundUp(Node* node) {
+  // TODO(sigurds): We could have a tighter bound here.
+  return Type::Number();
+}
+
+
 Type* Typer::Visitor::TypeFloat64RoundTruncate(Node* node) {
   // TODO(sigurds): We could have a tighter bound here.
   return Type::Number();