First pass at asynchronous input loading in dart2js.

tests/compiler/dart2js/type_variable_occurrence_test.dart

Index: tests/compiler/dart2js/type_variable_occurrence_test.dart
diff --git a/tests/compiler/dart2js/type_variable_occurrence_test.dart b/tests/compiler/dart2js/type_variable_occurrence_test.dart
index c9a28b979a8996086da8be08b38ea0777ee5bad3..28e3e3704d26589e68aac946edeb92c0d57bdf43 100644
--- a/tests/compiler/dart2js/type_variable_occurrence_test.dart
+++ b/tests/compiler/dart2js/type_variable_occurrence_test.dart
@@ -15,7 +15,7 @@ void main() {
 }
 
 testTypeVariableOccurrence() {
-  var env = new TypeEnvironment(r"""
+  TypeEnvironment.create(r"""
       typedef S Typedef1<S>();
       typedef void Typedef2<S>(S s);
       typedef void Typedef3<S>(A<S> a);
@@ -27,7 +27,7 @@ testTypeVariableOccurrence() {
         A<T> field4;
         A<A<int>> field5;
         A<A<T>> field6;
-    
+
         Typedef1 field7;
         Typedef1<int> field8;
         Typedef1<T> field9;
@@ -52,77 +52,77 @@ testTypeVariableOccurrence() {
         void method7([T t]) {}
         void method8({T t}) {}
       }
-      """);
-
-  ClassElement A = env.getElement('A');
-
-  expect(bool expect, String memberName) {
-    DartType memberType = env.getMemberType(A, memberName);
-    TypeVariableType typeVariable = memberType.typeVariableOccurrence;
-    if (expect) {
-      Expect.isNotNull(typeVariable);
-      Expect.equals(A, Types.getClassContext(memberType));
-    } else {
-      Expect.isNull(typeVariable);
-      Expect.isNull(Types.getClassContext(memberType));
+      """).then((env) {
+
+    ClassElement A = env.getElement('A');
+
+    expect(bool expect, String memberName) {
+      DartType memberType = env.getMemberType(A, memberName);
+      TypeVariableType typeVariable = memberType.typeVariableOccurrence;
+      if (expect) {
+        Expect.isNotNull(typeVariable);
+        Expect.equals(A, Types.getClassContext(memberType));
+      } else {
+        Expect.isNull(typeVariable);
+        Expect.isNull(Types.getClassContext(memberType));
+      }
     }
-  }
-
-  // int field1;
-  expect(false, 'field1');
-  // T field2;
-  expect(true, 'field2');
-  // A<int> field3;
-  expect(false, 'field3');
-  // A<T> field4;
-  expect(true, 'field4');
-  // A<A<int>> field5;
-  expect(false, 'field5');
-  // A<A<T>> field6;
-  expect(true, 'field6');
-
-  // Typedef1 field7;
-  expect(false, 'field7');
-  // Typedef1<int> field8;
-  expect(false, 'field8');
-  // Typedef1<T> field9;
-  expect(true, 'field9');
-  // Typedef1<Typedef1<T>> field10;
-  expect(true, 'field10');
-
-  // Typedef2 field11;
-  expect(false, 'field11');
-  // Typedef2<int> field12;
-  expect(false, 'field12');
-  // Typedef2<T> field13;
-  expect(true, 'field13');
-  // Typedef2<Typedef1<T>> field14;
-  expect(true, 'field14');
-
-  // Typedef3 field15;
-  expect(false, 'field15');
-  // Typedef3<int> field16;
-  expect(false, 'field16');
-  // Typedef3<T> field17;
-  expect(true, 'field17');
-  // Typedef3<Typedef1<T>> field18;
-  expect(true, 'field18');
-
-  // void method1() {}
-  expect(false, 'method1');
-  // T method2() => null;
-  expect(true, 'method2');
-  // A<T> method3() => null;
-  expect(true, 'method3');
-  // void method4(T t) {}
-  expect(true, 'method4');
-  // void method5(A<T> t) {}
-  expect(true, 'method5');
-  // void method6(void foo(T t)) {}
-  expect(true, 'method6');
-  // void method7([T t]);
-  expect(true, 'method7');
-  // void method8({T t});
-  expect(true, 'method8');
 
+    // int field1;
+    expect(false, 'field1');
+    // T field2;
+    expect(true, 'field2');
+    // A<int> field3;
+    expect(false, 'field3');
+    // A<T> field4;
+    expect(true, 'field4');
+    // A<A<int>> field5;
+    expect(false, 'field5');
+    // A<A<T>> field6;
+    expect(true, 'field6');
+
+    // Typedef1 field7;
+    expect(false, 'field7');
+    // Typedef1<int> field8;
+    expect(false, 'field8');
+    // Typedef1<T> field9;
+    expect(true, 'field9');
+    // Typedef1<Typedef1<T>> field10;
+    expect(true, 'field10');
+
+    // Typedef2 field11;
+    expect(false, 'field11');
+    // Typedef2<int> field12;
+    expect(false, 'field12');
+    // Typedef2<T> field13;
+    expect(true, 'field13');
+    // Typedef2<Typedef1<T>> field14;
+    expect(true, 'field14');
+
+    // Typedef3 field15;
+    expect(false, 'field15');
+    // Typedef3<int> field16;
+    expect(false, 'field16');
+    // Typedef3<T> field17;
+    expect(true, 'field17');
+    // Typedef3<Typedef1<T>> field18;
+    expect(true, 'field18');
+
+    // void method1() {}
+    expect(false, 'method1');
+    // T method2() => null;
+    expect(true, 'method2');
+    // A<T> method3() => null;
+    expect(true, 'method3');
+    // void method4(T t) {}
+    expect(true, 'method4');
+    // void method5(A<T> t) {}
+    expect(true, 'method5');
+    // void method6(void foo(T t)) {}
+    expect(true, 'method6');
+    // void method7([T t]);
+    expect(true, 'method7');
+    // void method8({T t});
+    expect(true, 'method8');
+  });
 }