Update handling of ambiguous name references

runtime/vm/flow_graph_builder.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/flow_graph_builder.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/ast_printer.h"
 #include "vm/bit_vector.h"
 #include "vm/code_descriptors.h"
@@ skipping 3656 matching lines @@
   Value* argument_names_value = Bind(cinstr);
   arguments->Add(PushArgument(argument_names_value));
 
   // List existingArgumentNames.
   Value* existing_argument_names_value =
       Bind(new ConstantInstr(Array::ZoneHandle()));
   arguments->Add(PushArgument(existing_argument_names_value));
   // Resolve and call NoSuchMethodError._throwNew.
   const Library& core_lib = Library::Handle(Library::CoreLibrary());
   const Class& cls = Class::Handle(
-      core_lib.LookupClass(Symbols::NoSuchMethodError(), NULL));
+      core_lib.LookupClass(Symbols::NoSuchMethodError()));
   ASSERT(!cls.IsNull());
   const Function& func = Function::ZoneHandle(
       Resolver::ResolveStatic(cls,
                               PrivateCoreLibName(Symbols::ThrowNew()),
                               arguments->length(),
                               Object::null_array(),
                               Resolver::kIsQualified));
   ASSERT(!func.IsNull());
   return new StaticCallInstr(token_pos,
                              func,
@@ skipping 126 matching lines @@
   intptr_t len = OS::SNPrint(NULL, 0, kFormat, function_name, reason) + 1;
   char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
   OS::SNPrint(chars, len, kFormat, function_name, reason);
   const Error& error = Error::Handle(
       LanguageError::New(String::Handle(String::New(chars))));
   Isolate::Current()->long_jump_base()->Jump(1, error);
 }
 
 
 }  // namespace dart