LGTM Just a couple extra newlines that should be removed before committing.
http://gwt-code-reviews.appspot.com/111805/diff/10/1013 File user/src/com/google/gwt/user/client/ui/HasHorizontalAlignment.java (right): http://gwt-code-reviews.appspot.com/111805/diff/10/1013#newcode41 Line 41: * Extra carriage return not needed. http://gwt-code-reviews.appspot.com/111805/diff/10/1014 File user/src/com/google/gwt/user/client/ui/HasVerticalAlignment.java (right): http://gwt-code-reviews.appspot.com/111805/diff/10/1014#newcode17 Line 17: Extra carriage return. This should be a checkstyle warning. http://gwt-code-reviews.appspot.com/111805 -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
