Added a few tests, removed some error codes from Resolver

Added a few tests, removed some error codes from Resolver

Committed: https://code.google.com/p/dart/source/detail?r=9313

[zundel, 2012-07-02 20:18:06]

https://chromiumcodereview.appspot.com/10695067/diff/1/compiler/java/com/goog...
File compiler/java/com/google/dart/compiler/resolver/Resolver.java (left):

https://chromiumcodereview.appspot.com/10695067/diff/1/compiler/java/com/goog...
compiler/java/com/google/dart/compiler/resolver/Resolver.java:1701: case LABEL:
Labels are in a different namespace, so they are never returned and this code is
never reached.

https://chromiumcodereview.appspot.com/10695067/diff/1/compiler/java/com/goog...
compiler/java/com/google/dart/compiler/resolver/Resolver.java:2059: } else if
(isImplicitlyInitialized && (variable.getValue() != null)) {
The only way to get in here is with a for..in statement and the parser already
flags using an initializer there, see
ParserErrorCode.FOR_IN_WITH_VARIABLE_INITIALIZER

[Brian Wilkerson, 2012-07-02 21:17:53]

LGTM

https://chromiumcodereview.appspot.com/10695067/diff/2002/compiler/java/com/g...
File
compiler/java/com/google/dart/compiler/resolver/CoreTypeProviderImplementation.java
(right):

https://chromiumcodereview.appspot.com/10695067/diff/2002/compiler/java/com/g...
compiler/java/com/google/dart/compiler/resolver/CoreTypeProviderImplementation.java:1:
// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
nit: copyright year