Support (de)serialization from command-line

pkg/compiler/lib/src/compiler.dart

Index: pkg/compiler/lib/src/compiler.dart
diff --git a/pkg/compiler/lib/src/compiler.dart b/pkg/compiler/lib/src/compiler.dart
index b2bdd0516ff4f64a94cb1bf1801e772906b18763..de80e0b910c52c655bf4c0ded86cc2b58ffc42ce 100644
--- a/pkg/compiler/lib/src/compiler.dart
+++ b/pkg/compiler/lib/src/compiler.dart
@@ -364,6 +364,9 @@ abstract class Compiler implements LibraryLoaderListener {
       reuseLibraryTask = new GenericTask('Reuse library', this),
       selfTask = new GenericTask('self', this),
     ];
+    if (options.resolveOnly) {
+      serialization.supportSerialization = true;
+    }
 
     _parsingContext =
         new ParsingContext(reporter, options, parser, patchParser, backend);
@@ -858,6 +861,12 @@ abstract class Compiler implements LibraryLoaderListener {
           }
         }
 
+        if (options.resolveOnly) {
+          reporter.log('Serializing to ${options.resolutionOutput}');
+          serialization.serializeToSink(
+              userOutputProvider.createEventSink('', 'data'),
+              libraryLoader.libraries);
+        }
         if (options.analyzeOnly) {
           if (!analyzeAll && !compilationFailed) {
             // No point in reporting unused code when [analyzeAll] is true: all