See http://stackoverflow.com/questions/28973603 for more context.

DELTA=3 (2 added, 0 deleted, 1 changed)
DELTA_BY_EXTENSION=js=3
RELNOTES: Fix goog.dom.dataset.remove for Safari in strict mode.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=122321211