Introduce a class encapsulating arguments descriptor arrays.

runtime/vm/code_patcher_ia32_test.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/globals.h"
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/code_patcher.h"
@@ skipping 38 matching lines @@
   const Script& script = Script::Handle();
   const Class& owner_class =
       Class::Handle(Class::New(class_name, script, Scanner::kDummyTokenIndex));
   const String& function_name =
       String::ZoneHandle(Symbols::New("callerFunction"));
   const Function& function = Function::ZoneHandle(
       Function::New(function_name, RawFunction::kRegularFunction,
                     true, false, false, false, owner_class, 0));
 
   const String& target_name = String::Handle(String::New("targetFunction"));
-  ICData& ic_data = ICData::ZoneHandle(
-      ICData::New(function, target_name, 15, 1));
+  const ICData& ic_data =
+      ICData::ZoneHandle(ICData::New(function, target_name, 15, 1));
+  const Array& arg_descriptor =
+      Array::ZoneHandle(ArgumentsDescriptor::New(1, Array::Handle()));
 
   __ LoadObject(ECX, ic_data);
-  __ LoadObject(EDX, DartEntry::ArgumentsDescriptor(1, Array::Handle()));
+  __ LoadObject(EDX, arg_descriptor);
   ExternalLabel target_label(
       "InlineCache", StubCode::OneArgCheckInlineCacheEntryPoint());
   __ call(&target_label);
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(IcDataAccess, entry) {
   uword return_address = entry + CodePatcher::InstanceCallSizeInBytes();
   const ICData& ic_data = ICData::Handle(
       CodePatcher::GetInstanceCallIcDataAt(return_address));
   EXPECT_STREQ("targetFunction",
       String::Handle(ic_data.target_name()).ToCString());
   EXPECT_EQ(1, ic_data.num_args_tested());
   EXPECT_EQ(0, ic_data.NumberOfChecks());
 }
 
 }  // namespace dart
 
 #endif  // TARGET_ARCH_IA32