Fix type analysis of the keyword "dynamic".

pkg/analyzer/test/generated/static_type_warning_code_test.dart

 // Copyright (c) 2014, 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 engine.static_type_warning_code_test;
 
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:unittest/unittest.dart';
 import 'resolver_test.dart';
@@ skipping 202 matching lines @@
 
   void test_invalidAssignment_defaultValue_optional() {
     Source source = addSource(r'''
 f([String x = 0]) {
 }''');
     resolve(source);
     assertErrors(source, [StaticTypeWarningCode.INVALID_ASSIGNMENT]);
     verify([source]);
   }
 
+  void test_invalidAssignment_dynamic() {
+    Source source = addSource(r'''
+main() {
+  dynamic = 1;
+}
+''');
+    resolve(source);
+    assertErrors(source, [StaticTypeWarningCode.INVALID_ASSIGNMENT]);
+    verify([source]);
+  }
+
   void test_invalidAssignment_instanceVariable() {
     Source source = addSource(r'''
 class A {
   int x;
 }
 f() {
   A a;
   a.x = '0';
 }''');
     resolve(source);
@@ skipping 1209 matching lines @@
     resolve(source);
     assertErrors(source, [StaticTypeWarningCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS]);
     verify([source]);
   }
 }
 
 main() {
   groupSep = ' | ';
   runReflectiveTests(StaticTypeWarningCodeTest);
 }