Support (de)serialization from command-line

pkg/compiler/lib/src/commandline_options.dart

Index: pkg/compiler/lib/src/commandline_options.dart
diff --git a/pkg/compiler/lib/src/commandline_options.dart b/pkg/compiler/lib/src/commandline_options.dart
index 9c0c2449cec994a30fb9e39e92453f03d22da771..fba840121bcd8f8d12070d2c1eabe91b0833efc8 100644
--- a/pkg/compiler/lib/src/commandline_options.dart
+++ b/pkg/compiler/lib/src/commandline_options.dart
@@ -53,9 +53,13 @@ class Flags {
 
   // Experimental flags.
   static const String genericMethodSyntax = '--generic-method-syntax';
+  static const String resolveOnly = '--resolve-only';
 }
 
 class Option {
   static const String showPackageWarnings =
       '${Flags.showPackageWarnings}|${Flags.showPackageWarnings}=.*';
+
+  // Experimental options.
+  static const String resolutionInput = '--resolution-input=.+';
 }