tweak FunctionTypeImpl to support generic methods

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

Index: pkg/analyzer/lib/src/generated/testing/element_factory.dart
diff --git a/pkg/analyzer/lib/src/generated/testing/element_factory.dart b/pkg/analyzer/lib/src/generated/testing/element_factory.dart
index f348ea845bfe48de66ad9c9ef6c5c530670183bf..dff33e9fc75407b3b2835469da6a4a66516af484 100644
--- a/pkg/analyzer/lib/src/generated/testing/element_factory.dart
+++ b/pkg/analyzer/lib/src/generated/testing/element_factory.dart
@@ -121,8 +121,8 @@ class ElementFactory {
       constructor.parameters = <ParameterElement>[];
     }
     constructor.returnType = type;
-    FunctionTypeImpl constructorType = new FunctionTypeImpl(constructor);
-    constructor.type = constructorType;
+    constructor.enclosingElement = definingClass;
+    constructor.type = new FunctionTypeImpl(constructor);
     return constructor;
   }
 
@@ -477,16 +477,15 @@ class ElementFactory {
   }
 
   static MethodElementImpl methodElementWithParameters(
+      ClassElement enclosingElement,
       String methodName,
-      List<DartType> typeArguments,
       DartType returnType,
       List<ParameterElement> parameters) {
     MethodElementImpl method = new MethodElementImpl(methodName, 0);
+    method.enclosingElement = enclosingElement;
     method.parameters = parameters;
     method.returnType = returnType;
-    FunctionTypeImpl methodType = new FunctionTypeImpl(method);
-    methodType.typeArguments = typeArguments;
-    method.type = methodType;
+    method.type = new FunctionTypeImpl(method);
     return method;
   }