update DDC to use analyzer extractDefinedVariables

pkg/dev_compiler/test/codegen_test.dart

Index: pkg/dev_compiler/test/codegen_test.dart
diff --git a/pkg/dev_compiler/test/codegen_test.dart b/pkg/dev_compiler/test/codegen_test.dart
index 6e2df1323f1a16572e01740be91a96220ddf1c8c..9bf3dc5fce8b53fc1069d5d3677f72766515ecb2 100644
--- a/pkg/dev_compiler/test/codegen_test.dart
+++ b/pkg/dev_compiler/test/codegen_test.dart
@@ -20,11 +20,12 @@ import 'package:analyzer/analyzer.dart'
         StringLiteral,
         UriBasedDirective,
         parseDirectives;
+import 'package:analyzer/src/command_line/arguments.dart'
+    show extractDefinedVariables;
 import 'package:analyzer/src/dart/ast/ast.dart';
 import 'package:analyzer/src/generated/source.dart' show Source;
 import 'package:args/args.dart' show ArgParser, ArgResults;
-import 'package:dev_compiler/src/analyzer/context.dart'
-    show AnalyzerOptions, parseDeclaredVariables;
+import 'package:dev_compiler/src/analyzer/context.dart';
 import 'package:dev_compiler/src/compiler/compiler.dart'
     show BuildUnit, CompilerOptions, JSModuleFile, ModuleCompiler;
 import 'package:dev_compiler/src/compiler/module_builder.dart'
@@ -139,7 +140,7 @@ main(List<String> arguments) {
 
       var declaredVars = <String, String>{};
       var argResults =
-          compileArgParser.parse(parseDeclaredVariables(args, declaredVars));
+          compileArgParser.parse(extractDefinedVariables(args, declaredVars));
       var options = new CompilerOptions.fromArguments(argResults);
       var moduleFormat = parseModuleFormatOption(argResults).first;