[compiler] Move generator optimization heuristics.

src/factory.cc

 // Copyright 2014 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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 2067 matching lines @@
     Handle<String> name, int number_of_literals, FunctionKind kind,
     Handle<Code> code, Handle<ScopeInfo> scope_info) {
   DCHECK(IsValidFunctionKind(kind));
   Handle<SharedFunctionInfo> shared = NewSharedFunctionInfo(
       name, code, IsConstructable(kind, scope_info->language_mode()));
   shared->set_scope_info(*scope_info);
   shared->set_kind(kind);
   shared->set_num_literals(number_of_literals);
   if (IsGeneratorFunction(kind)) {
     shared->set_instance_class_name(isolate()->heap()->Generator_string());
-    shared->DisableOptimization(kGenerator);
-  }
-  if (IsAsyncFunction(kind)) {
-    // TODO(caitp): Enable optimization of async functions when they are enabled
-    // for generators functions.
-    shared->DisableOptimization(kGenerator);
   }
   return shared;
 }
 
 
 Handle<JSMessageObject> Factory::NewJSMessageObject(
     MessageTemplate::Template message, Handle<Object> argument,
     int start_position, int end_position, Handle<Object> script,
     Handle<Object> stack_frames) {
   Handle<Map> map = message_object_map();
@@ skipping 291 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8