Fix analyzer warnings in js_util_test, skip js_util_test in csp mode and baseline expectations for …

tests/html/js_util_test.dart

 // Copyright (c) 2013, 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.
 
 @JS()
 library js_native_test;
 
 import 'dart:async';
 import 'dart:html';
 import 'dart:typed_data' show ByteBuffer, Int32List;
@@ skipping 50 matching lines @@
   document.body.append(script);
 }
 
 @JS()
 external bool checkMap(m, String, value);
 
 @JS('JSON.stringify')
 external String stringify(o);
 
 @JS('Node')
-external Function get JSNodeType;
+external get JSNodeType;
 
 @JS('Element')
-external Function get JSElementType;
+external get JSElementType;
 
 @JS('Text')
-external Function get JSTextType;
+external get JSTextType;
 
 @JS('HTMLCanvasElement')
-external Function get JSHtmlCanvasElementType;
+external get JSHtmlCanvasElementType;
 
 @JS()
 class Foo {
   external Foo(num a);
 
   external num get a;
   external num bar();
 }
 
 @JS('Foo')
-external Function get JSFooType;
+external get JSFooType;
 
 @JS()
 @anonymous
 class ExampleTypedLiteral {
   external factory ExampleTypedLiteral({a, b, JS$_c, JS$class});
 
   external get a;
   external get b;
   external get JS$_c;
   external set JS$_c(v);
   // Identical to JS$_c but only accessible within the library.
   external get _c;
   external get JS$class;
   external set JS$class(v);
 }
 
 @JS("Object.prototype.hasOwnProperty")
-external Function get _hasOwnProperty;
+external get _hasOwnProperty;
 
 bool hasOwnProperty(o, String name) {
   return js_util.callMethod(_hasOwnProperty, 'call', [o, name]);
 }
 
 main() {
   _injectJs();
   useHtmlIndividualConfiguration();
 
   group('js_util.jsify()', () {
@@ skipping 218 matching lines @@
       expect(textNode is Text, isTrue);
       expect(textNode.text, equals('foo'));
     });
 
     test('typed object', () {
       Foo f = js_util.callConstructor(JSFooType, [42]);
       expect(f.a, equals(42));
     });
   });
 }