Fix ParameterElementImpl.hasImplicitType for function-typed parameters.

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

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.src.serialization.elements_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 8399 matching lines @@
 ''');
     } else {
       checkElementText(
           library,
           r'''
 void f<T, U>((U) → T x) {}
 ''');
     }
   }
 
+  test_function_typed_parameter_implicit() {
+    var library = checkLibrary('f(g()) => null;');
+    expect(
+        library
+            .definingCompilationUnit.functions[0].parameters[0].hasImplicitType,
+        isFalse);
+  }
+
   test_functions() {
     var library = checkLibrary('f() {} g() {}');
     if (isStrongMode) {
       checkElementText(
           library,
           r'''
 dynamic f() {}
 dynamic g() {}
 ''');
     } else {
@@ skipping 6874 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }