Fix Chrome plugin compile errors by replacing "Value" with "gwt::Value".

Review at http://gwt-code-reviews.appspot.com/1835803

Review by: mdempsky@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@11294 8db76d5a-ed1c-0410-87a9-c151d255dfc7
3 files changed