[cleanup] Split ForOf and ForIn AST nodes apart as they share little

src/crankshaft/typing.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/typing.h"
 
 #include "src/ast/scopes.h"
 #include "src/frames.h"
 #include "src/frames-inl.h"
 #include "src/ostreams.h"
@@ skipping 286 matching lines @@
   stmt->set_for_in_type(static_cast<ForInStatement::ForInType>(
       oracle()->ForInType(stmt->ForInFeedbackSlot())));
 
   RECURSE(Visit(stmt->enumerable()));
   store_.Forget();  // Control may transfer here via looping or 'continue'.
   ObserveTypesAtOsrEntry(stmt);
   RECURSE(Visit(stmt->body()));
   store_.Forget();  // Control may transfer here via 'break'.
 }
 
-
-void AstTyper::VisitForOfStatement(ForOfStatement* stmt) {
-  RECURSE(Visit(stmt->iterable()));
-  store_.Forget();  // Control may transfer here via looping or 'continue'.
-  RECURSE(Visit(stmt->body()));
-  store_.Forget();  // Control may transfer here via 'break'.
-}
-
+void AstTyper::VisitForOfStatement(ForOfStatement* stmt) {}
 
 void AstTyper::VisitTryCatchStatement(TryCatchStatement* stmt) {
   Effects try_effects = EnterEffects();
   RECURSE(Visit(stmt->try_block()));
   ExitEffects();
   Effects catch_effects = EnterEffects();
   store_.Forget();  // Control may transfer here via 'throw'.
   RECURSE(Visit(stmt->catch_block()));
   ExitEffects();
   try_effects.Alt(catch_effects);
@@ skipping 470 matching lines @@
 void AstTyper::VisitImportDeclaration(ImportDeclaration* declaration) {
 }
 
 
 void AstTyper::VisitExportDeclaration(ExportDeclaration* declaration) {
 }
 
 
 }  // namespace internal
 }  // namespace v8