Create frequently used symbols in the vm isolate

vm/class_finalizer_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/assert.h"
 #include "vm/class_finalizer.h"
+#include "vm/symbols.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
 
 static RawClass* CreateTestClass(const char* name) {
   const Array& empty_array = Array::Handle(Array::Empty());
-  const String& class_name = String::Handle(String::NewSymbol(name));
+  const String& class_name = String::Handle(Symbols::New(name));
   const Script& script = Script::Handle();
   const Class& cls =
       Class::Handle(Class::New(class_name, script, Scanner::kDummyTokenIndex));
   cls.set_interfaces(empty_array);
   cls.SetFunctions(empty_array);
   cls.SetFields(empty_array);
   return cls.raw();
 }
 
 
@@ skipping 39 matching lines @@
   // Create a cycle.
   classes[0]->set_super_type(
       Type::Handle(Type::NewNonParameterizedType(*classes[1])));
   classes[1]->set_super_type(
       Type::Handle(Type::NewNonParameterizedType(*classes[0])));
   EXPECT(!ClassFinalizer::FinalizePendingClasses());
 }
 
 
 static RawLibrary* NewLib(const char* url_chars) {
-  String& url = String::ZoneHandle(String::NewSymbol(url_chars));
+  String& url = String::ZoneHandle(Symbols::New(url_chars));
   return Library::New(url);
 }
 
 
 TEST_CASE(ClassFinalize_Resolve) {
   Isolate* isolate = Isolate::Current();
   ObjectStore* object_store = isolate->object_store();
   const GrowableObjectArray& pending_classes =
       GrowableObjectArray::Handle(isolate, object_store->pending_classes());
   Class& rhb = Class::Handle(CreateTestClass("RhB"));
@@ skipping 10 matching lines @@
                            Scanner::kDummyTokenIndex));
   const TypeArguments& type_arguments = TypeArguments::Handle();
   rhb.set_super_type(Type::Handle(
       Type::New(Object::Handle(unresolved.raw()),
                 type_arguments,
                 Scanner::kDummyTokenIndex)));
   EXPECT(ClassFinalizer::FinalizePendingClasses());
 }
 
 }  // namespace dart