[gwt-contrib] Add ProvidesKey support to ValuePicker (issue1614807)

[stephen . haberman]

Reviewers: rdayal, tbroyer,



Please review this at http://gwt-code-reviews.appspot.com/1614807/

Affected files:
  A user/src/com/google/gwt/cell/client/RenderedCell.java
  M user/src/com/google/gwt/user/client/ui/ValuePicker.java
  A user/test/com/google/gwt/user/client/ui/ValuePickerTest.java


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