Create frequently used symbols in the vm isolate

vm/intermediate_language.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 "vm/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/flow_graph_compiler.h"
 #include "vm/locations.h"
 #include "vm/object.h"
 #include "vm/os.h"
 #include "vm/scopes.h"
 #include "vm/stub_code.h"
+#include "vm/symbols.h"
 
 namespace dart {
 
 MethodRecognizer::Kind MethodRecognizer::RecognizeKind(
     const Function& function) {
   // Only core library methods can be recognized.
   const Library& core_lib = Library::Handle(Library::CoreLibrary());
   const Library& core_impl_lib = Library::Handle(Library::CoreImplLibrary());
   const Class& function_class = Class::Handle(function.owner());
   if ((function_class.library() != core_lib.raw()) &&
       (function_class.library() != core_impl_lib.raw())) {
     return kUnknown;
   }
   const String& recognize_name = String::Handle(function.name());
   const String& recognize_class = String::Handle(function_class.Name());
   String& test_function_name = String::Handle();
   String& test_class_name = String::Handle();
 #define RECOGNIZE_FUNCTION(class_name, function_name, enum_name)               \
-  test_function_name = String::NewSymbol(#function_name);                      \
-  test_class_name = String::NewSymbol(#class_name);                            \
+  test_function_name = Symbols::New(#function_name);                           \
+  test_class_name = Symbols::New(#class_name);                                 \
   if (recognize_name.Equals(test_function_name) &&                             \
       recognize_class.Equals(test_class_name)) {                               \
     return k##enum_name;                                                       \
   }
 RECOGNIZED_LIST(RECOGNIZE_FUNCTION)
 #undef RECOGNIZE_FUNCTION
   return kUnknown;
 }
 
 
@@ skipping 1266 matching lines @@
   const ExternalLabel label(closure_function.ToCString(), stub.EntryPoint());
   compiler->GenerateCall(token_pos(), try_index(), &label,
                          PcDescriptors::kOther);
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 
 #undef __
 
 }  // namespace dart