Fix for resynthesizing generic functions during linking.

pkg/analyzer/test/src/summary/linker_test.dart

Index: pkg/analyzer/test/src/summary/linker_test.dart
diff --git a/pkg/analyzer/test/src/summary/linker_test.dart b/pkg/analyzer/test/src/summary/linker_test.dart
index 01a6c44b747fb5b4327b83d3b8661a8eb8fe0849..38796c203823736d90caf85d085c37faea3d34e5 100644
--- a/pkg/analyzer/test/src/summary/linker_test.dart
+++ b/pkg/analyzer/test/src/summary/linker_test.dart
@@ -458,6 +458,32 @@ class C extends B {
     expect(cls.methods[0].returnType.toString(), 'void');
   }
 
+  void test_inferredType_parameter_genericFunctionType() {
+    var bundle = createPackageBundle(
+        '''
+class A<T> {
+  A<R> map<R>(R Function(T) f) => null;
+}
+''',
+        path: '/a.dart');
+    addBundle('/a.ds', bundle);
+    createLinker('''
+import 'a.dart';
+class C extends A<int> {
+  map<R2>(f) => null;
+}
+''');
+    LibraryElementForLink library = linker.getLibrary(linkerInputs.testDartUri);
+    library.libraryCycleForLink.ensureLinked();
+    ClassElementForLink_Class c = library.getContainedName('C');
+    expect(c.methods, hasLength(1));
+    MethodElementForLink map = c.methods[0];
+    expect(map.parameters, hasLength(1));
+    FunctionType fType = map.parameters[0].type;
+    expect(fType.returnType.toString(), 'R2');
+    expect(fType.parameters[0].type.toString(), 'int');
+  }
+
   void test_inferredType_staticField_dynamic() {
     createLinker('''
 dynamic x = null;