
use goog.date.DateLike type over Date during the date comparison

R=pallosp
DELTA=6  (0 added, 0 deleted, 6 changed)


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git-svn-id: 35241bd708fe29f1f6c7a4322d322e99ff93b95e@421 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

johan/closure-library,johan/closure-library,johan/closure-library