Use symbol literals in the mirror tests. (Except for void, the empty string and setters.)

tests/lib/mirrors/invoke_throws_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.
 
 library test.invoke_throws_test;
 
 import 'dart:mirrors';
 
 import 'package:expect/expect.dart';
 
@@ skipping 17 matching lines @@
   static set staticSetter(v) { throw new MyException(); }
   static staticFunction() { throw new MyException(); }
 }
 
 get libraryGetter { throw new MyException(); }
 set librarySetter(v) { throw new MyException(); }
 libraryFunction() { throw new MyException(); }
 
 main() {
   InstanceMirror im = reflect(new Class.noException());
-  Expect.throws(() => im.getField(const Symbol('getter')),
+  Expect.throws(() => im.getField(#getter),
                 (e) => e is MyException);
-  Expect.throws(() => im.setField(const Symbol('setter'), ['arg']),
+  Expect.throws(() => im.setField(#setter, ['arg']),
                 (e) => e is MyException);
-  Expect.throws(() => im.invoke(const Symbol('method'), []),
+  Expect.throws(() => im.invoke(#method, []),
                 (e) => e is MyException);
-  Expect.throws(() => im.invoke(const Symbol('triggerNoSuchMethod'), []),
+  Expect.throws(() => im.invoke(#triggerNoSuchMethod, []),
                 (e) => e is MyException);
 
   ClassMirror cm = reflectClass(Class);
-  Expect.throws(() => cm.getField(const Symbol('staticGetter')),
+  Expect.throws(() => cm.getField(#staticGetter),
                 (e) => e is MyException);
-  Expect.throws(() => cm.setField(const Symbol('staticSetter'), ['arg']),
+  Expect.throws(() => cm.setField(#staticSetter, ['arg']),
                 (e) => e is MyException);
-  Expect.throws(() => cm.invoke(const Symbol('staticFunction'), []),
+  Expect.throws(() => cm.invoke(#staticFunction, []),
                 (e) => e is MyException);
-  Expect.throws(() => cm.newInstance(const Symbol('generative'), []),
+  Expect.throws(() => cm.newInstance(#generative, []),
                 (e) => e is MyException);
-  Expect.throws(() => cm.newInstance(const Symbol('redirecting'), []),
+  Expect.throws(() => cm.newInstance(#redirecting, []),
                 (e) => e is MyException);
-  Expect.throws(() => cm.newInstance(const Symbol('faktory'), []),
+  Expect.throws(() => cm.newInstance(#faktory, []),
                 (e) => e is MyException);
-  Expect.throws(() => cm.newInstance(const Symbol('redirectingFactory'), []),
+  Expect.throws(() => cm.newInstance(#redirectingFactory, []),
                 (e) => e is MyException);
 
   LibraryMirror lm = reflectClass(Class).owner;
-  Expect.throws(() => lm.getField(const Symbol('libraryGetter')),
+  Expect.throws(() => lm.getField(#libraryGetter),
                 (e) => e is MyException);
-  Expect.throws(() => lm.setField(const Symbol('librarySetter'), ['arg']),
+  Expect.throws(() => lm.setField(#librarySetter, ['arg']),
                 (e) => e is MyException);
-  Expect.throws(() => lm.invoke(const Symbol('libraryFunction'), []),
+  Expect.throws(() => lm.invoke(#libraryFunction, []),
                 (e) => e is MyException);
 }