[turbofan] Turn common Guard operator into simplified TypeGuard.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 1a7e99d78217139ab5ad09aba1b1048c76d3f7cd..a03bd92a88418022e56bdf4c707d2e36ed991bec 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -699,10 +699,9 @@ Type* Typer::Visitor::TypeEffectPhi(Node* node) {
   return nullptr;
 }
 
-
-Type* Typer::Visitor::TypeGuard(Node* node) {
+Type* Typer::Visitor::TypeTypeGuard(Node* node) {
   Type* input_type = Operand(node, 0);
-  Type* guard_type = OpParameter<Type*>(node);
+  Type* guard_type = TypeOf(node->op());
   return Type::Intersect(input_type, guard_type, zone());
 }