Revert changes 17962-3 which break Dartium Debug build.

runtime/vm/object_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/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
@@ skipping 2571 matching lines @@
   const String& parent_name = String::Handle(Symbols::New("foo_papa"));
   parent = Function::New(parent_name, RawFunction::kRegularFunction,
                          false, false, false, false, cls, 0);
   functions.SetAt(0, parent);
   cls.SetFunctions(functions);
 
   Function& function = Function::Handle();
   const String& function_name = String::Handle(Symbols::New("foo"));
   function = Function::NewClosureFunction(function_name, parent, 0);
   const Class& signature_class = Class::Handle(
-      Class::NewSignatureClass(function_name, function, script, 0));
+      Class::NewSignatureClass(function_name, function, script));
   const Instance& closure = Instance::Handle(Closure::New(function, context));
   const Class& closure_class = Class::Handle(closure.clazz());
   EXPECT(closure_class.IsSignatureClass());
   EXPECT(closure_class.IsCanonicalSignatureClass());
   EXPECT_EQ(closure_class.raw(), signature_class.raw());
   const Function& signature_function =
     Function::Handle(signature_class.signature_function());
   EXPECT_EQ(signature_function.raw(), function.raw());
   const Context& closure_context = Context::Handle(Closure::context(closure));
   EXPECT_EQ(closure_context.raw(), closure_context.raw());
@@ skipping 983 matching lines @@
   EXPECT_NE(test1.SourceFingerprint(), test3.SourceFingerprint());
   EXPECT_NE(test3.SourceFingerprint(), test4.SourceFingerprint());
   EXPECT_NE(test4.SourceFingerprint(), test5.SourceFingerprint());
   EXPECT_NE(test5.SourceFingerprint(), test6.SourceFingerprint());
   EXPECT_EQ(test6.SourceFingerprint(), test7.SourceFingerprint());
 }
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart