cleanup --batch-mode sourceFiles

pkg/analyzer_cli/lib/src/options.dart

Index: pkg/analyzer_cli/lib/src/options.dart
diff --git a/pkg/analyzer_cli/lib/src/options.dart b/pkg/analyzer_cli/lib/src/options.dart
index 957910a1e368c306f99b20b998e77954753930ec..f93d5f6e62ffe6cc4769df893ccf81d87f3f5bcd 100644
--- a/pkg/analyzer_cli/lib/src/options.dart
+++ b/pkg/analyzer_cli/lib/src/options.dart
@@ -120,7 +120,7 @@ class CommandLineOptions {
   final bool showSdkWarnings;
 
   /// The source files to analyze
-  final List<String> sourceFiles;
+  List<String> _sourceFiles;
 
   /// Whether to treat warnings as fatal
   final bool warningsAreFatal;
@@ -173,7 +173,7 @@ class CommandLineOptions {
             args['x-package-warnings-prefix'] != null,
         showPackageWarningsPrefix = args['x-package-warnings-prefix'],
         showSdkWarnings = args['sdk-warnings'],
-        sourceFiles = args.rest,
+        _sourceFiles = args.rest,
         warningsAreFatal = args['fatal-warnings'],
         strongMode = args['strong'],
         implicitCasts = !args['no-implicit-casts'],
@@ -259,6 +259,14 @@ class CommandLineOptions {
     return options;
   }
 
+  /// The source files to analyze
+  List<String> get sourceFiles => _sourceFiles;
+
+  /// Replace the sourceFiles parsed from the command line.
+  void rewriteSourceFiles(List<String> newSourceFiles) {
+    _sourceFiles = newSourceFiles;
+  }
+
   static String _getVersion() {
     try {
       // This is relative to bin/snapshot, so ../..