[turbofan] Introduce node regions for protection from scheduling.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 4707aef1e519cafcb5de1d29375ca4f5be8e9e77..46d917ab69a9177cd8b39dba84308c82346acbdc 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -554,13 +554,13 @@ Type* Typer::Visitor::TypeEffectSet(Node* node) {
 }
 
 
-Type* Typer::Visitor::TypeValueEffect(Node* node) {
+Type* Typer::Visitor::TypeBeginRegion(Node* node) {
   UNREACHABLE();
   return nullptr;
 }
 
 
-Type* Typer::Visitor::TypeFinish(Node* node) { return Operand(node, 0); }
+Type* Typer::Visitor::TypeFinishRegion(Node* node) { return Operand(node, 0); }
 
 
 Type* Typer::Visitor::TypeFrameState(Node* node) {