Don't allocate AstTyper with the zone allocator.

src/typing.cc

Index: src/typing.cc
diff --git a/src/typing.cc b/src/typing.cc
index 204ace6c9688e0bff9089ad16c462d95018c3393..22e4b219d9d05ffdacfba20d3278f8b852326465 100644
--- a/src/typing.cc
+++ b/src/typing.cc
@@ -26,24 +26,6 @@ AstTyper::AstTyper(CompilationInfo* info)
 }
 
 
-#define RECURSE(call)                         \
-  do {                                        \
-    DCHECK(!visitor->HasStackOverflow());     \
-    call;                                     \
-    if (visitor->HasStackOverflow()) return;  \
-  } while (false)
-
-void AstTyper::Run(CompilationInfo* info) {
-  AstTyper* visitor = new(info->zone()) AstTyper(info);
-  Scope* scope = info->scope();
-
-  RECURSE(visitor->VisitDeclarations(scope->declarations()));
-  RECURSE(visitor->VisitStatements(info->literal()->body()));
-}
-
-#undef RECURSE
-
-
 #ifdef OBJECT_PRINT
   static void PrintObserved(Variable* var, Object* value, Type* type) {
     OFStream os(stdout);
@@ -122,6 +104,13 @@ void AstTyper::ObserveTypesAtOsrEntry(IterationStatement* stmt) {
   } while (false)
 
 
+void AstTyper::Run() {
+  Scope* scope = info_->scope();
+  RECURSE(VisitDeclarations(scope->declarations()));
+  RECURSE(VisitStatements(info_->literal()->body()));
+}
+
+
 void AstTyper::VisitStatements(ZoneList<Statement*>* stmts) {
   for (int i = 0; i < stmts->length(); ++i) {
     Statement* stmt = stmts->at(i);