Implement new return type checking rules in analyzer.

pkg/analyzer/lib/src/generated/testing/test_type_provider.dart

Index: pkg/analyzer/lib/src/generated/testing/test_type_provider.dart
diff --git a/pkg/analyzer/lib/src/generated/testing/test_type_provider.dart b/pkg/analyzer/lib/src/generated/testing/test_type_provider.dart
index 7df920aed0b601c642159f776be1893b81699b86..0d904896bb8fdf2af3a833238b97abfb7a02f7f7 100644
--- a/pkg/analyzer/lib/src/generated/testing/test_type_provider.dart
+++ b/pkg/analyzer/lib/src/generated/testing/test_type_provider.dart
@@ -47,6 +47,11 @@ class TestTypeProvider implements TypeProvider {
   InterfaceType _functionType;
 
   /**
+   * The type representing 'Future<dynamic>'
+   */
+  InterfaceType _futureDynamicType;
+
+  /**
    * The type representing 'Future<Null>'
    */
   InterfaceType _futureNullType;
@@ -197,6 +202,14 @@ class TestTypeProvider implements TypeProvider {
   }
 
   @override
+  InterfaceType get futureDynamicType {
+    if (_futureDynamicType == null) {
+      _futureDynamicType = futureType.substitute4(<DartType>[dynamicType]);
+    }
+    return _futureDynamicType;
+  }
+
+  @override
   InterfaceType get futureNullType {
     if (_futureNullType == null) {
       _futureNullType = futureType.substitute4(<DartType>[nullType]);