Ensure list/string/isolate are enabled when main has arguments.

sdk/lib/_internal/compiler/implementation/compiler.dart

Index: sdk/lib/_internal/compiler/implementation/compiler.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/compiler.dart	(revision 29238)
+++ sdk/lib/_internal/compiler/implementation/compiler.dart	(working copy)
@@ -1028,13 +1028,17 @@
         }
         FunctionElement mainMethod = main;
         FunctionSignature parameters = mainMethod.computeSignature(this);
-        parameters.forEachParameter((Element parameter) {
-          reportError(
-              parameter,
-              MessageKind.GENERIC,
-              {'text':
-                "Error: '$MAIN' cannot have parameters."});
-        });
+        if (parameters.parameterCount > 2) {
+          int index = 0;
+          parameters.forEachParameter((Element parameter) {
+            if (index++ < 2) return;
+            reportError(
+                parameter,
+                MessageKind.GENERIC,
+                {'text':
+                  "Error: '$MAIN' cannot have more than two parameters."});
+          });
+        }
       }
 
       mirrorUsageAnalyzerTask.analyzeUsage(mainApp);
@@ -1141,6 +1145,14 @@
   void processQueue(Enqueuer world, Element main) {
     world.nativeEnqueuer.processNativeClasses(libraries.values);
     if (main != null) {
+      if (main.computeSignature(this).parameterCount != 0) {
+        // TODO(ngeoffray, floitsch): we should also ensure that the
+        // class IsolateMessage is instantiated. Currently, just enabling
+        // isolate support works.
+        world.enableIsolateSupport(main.getLibrary());
+        world.registerInstantiatedClass(listClass, globalDependencies);
+        world.registerInstantiatedClass(stringClass, globalDependencies);
+      }
       world.addToWorkList(main);
     }
     progress.reset();