Bug 870051 - Fix build warning. r=dholbert
Bug 828563 - Part 2: Use Location.getTime() instead of getElapsedRealtimeNanos(). a=bustage CLOSED TREE

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extra : amend_source : 85ba5aa824bed8f15b98537672eee1cccba44416
Backout 6ee620315ad4 for causing test timeouts on a CLOSED TREE