Update handling of ambiguous name references

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 "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/isolate.h"
@@ skipping 3234 matching lines @@
 
 static RawField* GetField(const Class& cls, const char* name) {
   const Field& field =
       Field::Handle(cls.LookupField(String::Handle(String::New(name))));
   EXPECT(!field.IsNull());
   return field.raw();
 }
 
 
 static RawClass* GetClass(const Library& lib, const char* name) {
-  String& ambiguity_error_msg = String::Handle();
   const Class& cls = Class::Handle(
-      lib.LookupClass(String::Handle(Symbols::New(name)),
-                      &ambiguity_error_msg));
+      lib.LookupClass(String::Handle(Symbols::New(name))));
   EXPECT(!cls.IsNull());  // No ambiguity error expected.
   return cls.raw();
 }
 
 
 static void PrintMetadata(const char* name, const Object& data) {
   if (data.IsError()) {
     OS::Print("Error in metadata evaluation for %s: '%s'\n",
               name,
               Error::Cast(data).ToErrorCString());
@@ skipping 120 matching lines @@
       "    return a > 1 ? a + 1 : a;\n"
       "  }\n"
       "}";
   TestCase::LoadTestScript(kScriptChars, NULL);
   EXPECT(ClassFinalizer::FinalizePendingClasses());
   const String& name = String::Handle(String::New(TestCase::url()));
   const Library& lib = Library::Handle(Library::LookupLibrary(name));
   EXPECT(!lib.IsNull());
 
   const Class& class_a = Class::Handle(
-      lib.LookupClass(String::Handle(Symbols::New("A")), NULL));
+      lib.LookupClass(String::Handle(Symbols::New("A"))));
   const Class& class_b = Class::Handle(
-      lib.LookupClass(String::Handle(Symbols::New("B")), NULL));
+      lib.LookupClass(String::Handle(Symbols::New("B"))));
   const Function& a_test1 =
       Function::Handle(GetStaticFunction(class_a, "test1"));
   const Function& b_test1 =
       Function::Handle(GetStaticFunction(class_b, "test1"));
   const Function& a_test2 =
       Function::Handle(GetStaticFunction(class_a, "test2"));
   const Function& a_test3 =
       Function::Handle(GetStaticFunction(class_a, "test3"));
   const Function& a_test4 =
       Function::Handle(GetStaticFunction(class_a, "test4"));
@@ skipping 40 matching lines @@
   cls = Object::dynamic_class();
   array = cls.fields();
   EXPECT(!array.IsNull());
   EXPECT(array.IsArray());
   array = cls.functions();
   EXPECT(!array.IsNull());
   EXPECT(array.IsArray());
 }
 
 }  // namespace dart