Enable read-only access to initializing formals (issue 27895)

pkg/analyzer/lib/src/command_line/arguments.dart

 // Copyright (c) 2016, 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.
 
 library analyzer.src.command_line.arguments;
 
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/builder.dart';
@@ skipping 28 matching lines @@
   //
   builderOptions.dartSdkSummaryPath = args[sdkSummaryPathOption];
   builderOptions.defaultAnalysisOptionsFilePath =
       args[analysisOptionsFileOption];
   builderOptions.defaultPackageFilePath = args[packagesOption];
   builderOptions.defaultPackagesDirectoryPath = args[packageRootOption];
   //
   // Analysis options.
   //
   AnalysisOptionsImpl defaultOptions = new AnalysisOptionsImpl();
-  defaultOptions.enableInitializingFormalAccess =
-      args[enableInitializingFormalAccessFlag];
   defaultOptions.enableStrictCallChecks = args[enableStrictCallChecksFlag];
   defaultOptions.enableSuperMixins = args[enableSuperInMixinFlag];
   defaultOptions.implicitCasts = !args[noImplicitCastsFlag];
   defaultOptions.implicitDynamic = !args[noImplicitDynamicFlag];
   defaultOptions.strongMode = args[strongModeFlag];
   builderOptions.defaultOptions = defaultOptions;
   //
   // Declared variables.
   //
   Map<String, String> declaredVariables = <String, String>{};
@@ skipping 186 matching lines @@
           .replaceAll('\r', '\n')
           .split('\n')
           .where((String line) => line.isNotEmpty));
       return newArgs;
     } on FileSystemException {
       // Don't modify args if the file does not exist or cannot be read.
     }
   }
   return args;
 }