Cleanups based on Kevin's and Florian's suggestions.

runtime/vm/dart_entry.cc

 // Copyright (c) 2011, 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/dart_entry.h"
 
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
 #include "vm/object_store.h"
 #include "vm/resolver.h"
@@ skipping 116 matching lines @@
 intptr_t ArgumentsDescriptor::Count() const {
   return Smi::CheckedHandle(array_.At(kCountIndex)).Value();
 }
 
 
 intptr_t ArgumentsDescriptor::PositionalCount() const {
   return Smi::CheckedHandle(array_.At(kPositionalCountIndex)).Value();
 }
 
 
-RawString* ArgumentsDescriptor::NameAt(intptr_t index) const {
-  String& result = String::Handle();
-  result ^= array_.At(kFirstNamedEntryIndex +
-                      (index * kNamedEntrySize) +
-                      kNameOffset);
-  return result.raw();
+bool ArgumentsDescriptor::MatchesNameAt(intptr_t index,
+                                        const String& other) const {
+  const intptr_t offset = kFirstNamedEntryIndex +
+                          (index * kNamedEntrySize) +
+                          kNameOffset;
+  return array_.At(offset) == other.raw();
 }
 
 
 intptr_t ArgumentsDescriptor::count_offset() {
   return Array::data_offset() + (kCountIndex * kWordSize);
 }
 
 
 intptr_t ArgumentsDescriptor::positional_count_offset() {
   return Array::data_offset() + (kPositionalCountIndex * kWordSize);
@@ skipping 208 matching lines @@
   const String& func_name = String::Handle(Field::GetterName(field_name));
   const Function& func = Function::Handle(cls.LookupDynamicFunction(func_name));
   ASSERT(!func.IsNull());
   GrowableArray<const Object*> arguments;
   const Array& kNoArgumentNames = Array::Handle();
   return DartEntry::InvokeDynamic(port, func, arguments, kNoArgumentNames);
 }
 
 
 }  // namespace dart