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

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

R=mlippautz@google.com

Committed: https://code.google.com/p/dart/source/detail?r=27773

[Michael Lippautz (Google), 2013-09-20 21:11:16]

lgtm

https://chromiumcodereview.appspot.com/24239010/diff/1/tests/lib/mirrors/para...
File tests/lib/mirrors/parameter_test.dart (right):

https://chromiumcodereview.appspot.com/24239010/diff/1/tests/lib/mirrors/para...
tests/lib/mirrors/parameter_test.dart:51: #B, #B.bar, #B.baz,
fits on one line?

[hausner, 2013-09-22 04:28:19]

DBC: looking at this code, I wish we had designed Symbol literals as #"abc"
instead of #abc. I think that would look nicer and also reflects better what the
# operator actually does. Would also match the r"abc" syntax.

[rmacnak, 2013-09-23 16:17:44]

Committed patchset #2 manually as r27773 (presubmit successful).