First pass at asynchronous input loading in dart2js.

tests/compiler/dart2js/simple_inferrer_and_or_test.dart

Index: tests/compiler/dart2js/simple_inferrer_and_or_test.dart
diff --git a/tests/compiler/dart2js/simple_inferrer_and_or_test.dart b/tests/compiler/dart2js/simple_inferrer_and_or_test.dart
index eccf8493dfb834e4d730db91379ed0062fcb2c48..6b199177690a2dc7f2473112cfb5d8f21ae5c659 100644
--- a/tests/compiler/dart2js/simple_inferrer_and_or_test.dart
+++ b/tests/compiler/dart2js/simple_inferrer_and_or_test.dart
@@ -57,22 +57,23 @@ main() {
 void main() {
   Uri uri = new Uri(scheme: 'source');
   var compiler = compilerFor(TEST, uri);
-  compiler.runCompiler(uri);
-  var typesInferrer = compiler.typesTask.typesInferrer;
+  compiler.runCompiler(uri).then((_) {
+    var typesInferrer = compiler.typesTask.typesInferrer;
 
-  checkReturn(String name, type) {
-    var element = findElement(compiler, name);
-    Expect.equals(type,
-        typesInferrer.internal.returnTypeOf[element].simplify(compiler));
-  }
+    checkReturn(String name, type) {
+      var element = findElement(compiler, name);
+      Expect.equals(type,
+          typesInferrer.internal.returnTypeOf[element].simplify(compiler));
+    }
 
-  var subclassOfInterceptor =
-      findTypeMask(compiler, 'Interceptor', 'nonNullSubclass');
+    var subclassOfInterceptor =
+        findTypeMask(compiler, 'Interceptor', 'nonNullSubclass');
 
-  checkReturn('returnDyn1', subclassOfInterceptor);
-  checkReturn('returnDyn2', subclassOfInterceptor);
-  checkReturn('returnDyn3', subclassOfInterceptor);
-  checkReturn('returnDyn4', typesInferrer.dynamicType.nonNullable());
-  checkReturn('returnDyn5', typesInferrer.dynamicType.nonNullable());
-  checkReturn('returnDyn6', typesInferrer.dynamicType.nonNullable());
+    checkReturn('returnDyn1', subclassOfInterceptor);
+    checkReturn('returnDyn2', subclassOfInterceptor);
+    checkReturn('returnDyn3', subclassOfInterceptor);
+    checkReturn('returnDyn4', typesInferrer.dynamicType.nonNullable());
+    checkReturn('returnDyn5', typesInferrer.dynamicType.nonNullable());
+    checkReturn('returnDyn6', typesInferrer.dynamicType.nonNullable());
+  });
 }