Introduce a SignatureData class so that signature functions can store both their

runtime/vm/parser.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/parser.h"
 #include "vm/flags.h"
 
 #ifndef DART_PRECOMPILED_RUNTIME
 
 #include "lib/invocation_mirror.h"
@@ skipping 2071 matching lines @@
                                     &Object::dynamic_type());
 
       const bool no_explicit_default_values = false;
       ParseFormalParameterList(no_explicit_default_values, false, &func_params);
 
       signature_function.set_result_type(result_type);
       AddFormalParamsToFunction(&func_params, signature_function);
 
       ASSERT(innermost_function().raw() == signature_function.raw());
       innermost_function_ = signature_function.parent_function();
-      signature_function.set_data(Object::Handle(Z));
 
       Type& signature_type =
           Type::ZoneHandle(Z, signature_function.SignatureType());
       if (!is_top_level_) {
         signature_type ^= ClassFinalizer::FinalizeType(
             current_class(), signature_type, ClassFinalizer::kCanonicalize);
         signature_function.SetSignatureType(signature_type);
       }
       ASSERT(is_top_level_ || signature_type.IsFinalized());
       // A signature type itself cannot be malformed or malbounded, only its
@@ skipping 12440 matching lines @@
     const ArgumentListNode& function_args,
     const LocalVariable* temp_for_last_arg,
     bool is_super_invocation) {
   UNREACHABLE();
   return NULL;
 }
 
 }  // namespace dart
 
 #endif  // DART_PRECOMPILED_RUNTIME