Add the '--build-summary-only-ast' flag for generating summaries using only ASTs.

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 2003abf2dafa23fa4e405f98751f0e4a1672cabc..f1095ef7630cdf534b2f521733fc000a6651c7c5 100644
--- a/pkg/analyzer_cli/lib/src/options.dart
+++ b/pkg/analyzer_cli/lib/src/options.dart
@@ -45,6 +45,10 @@ class CommandLineOptions {
   /// Whether to skip analysis when creating summaries in build mode.
   final bool buildSummaryOnly;
 
+  /// Whether to create summaries using only ASTs, i.e. don't perform
+  /// resolution.
+  final bool buildSummaryOnlyAst;
+
   /// Whether to use diet parsing, i.e. skip function bodies. We don't need to
   /// analyze function bodies to use summaries during future compilation steps.
   final bool buildSummaryOnlyDiet;
@@ -144,6 +148,7 @@ class CommandLineOptions {
         buildSummaryFallback = args['build-summary-fallback'],
         buildSummaryInputs = args['build-summary-input'],
         buildSummaryOnly = args['build-summary-only'],
+        buildSummaryOnlyAst = args['build-summary-only-ast'],
         buildSummaryOnlyDiet = args['build-summary-only-diet'],
         buildSummaryExcludeInformative =
             args['build-summary-exclude-informative'],
@@ -350,6 +355,11 @@ class CommandLineOptions {
           defaultsTo: false,
           negatable: false,
           hide: true)
+      ..addFlag('build-summary-only-ast',
+          help: 'Generate summaries using ASTs.',
+          defaultsTo: false,
+          negatable: false,
+          hide: true)
       ..addFlag('build-summary-only-diet',
           help: 'Diet parse function bodies.',
           defaultsTo: false,