Mark Mentovai 6997418cd4 Add InRangeCast<> and its test.
InRangeCast<> is similar to base::saturated_cast<>, but it allows the
caller to specify the value to be returned in the event that the source
value can’t be converted to the destination data type without data loss.

TEST=util_test InRangeCast
R=rsesek@chromium.org

Review URL: https://codereview.chromium.org/467103002
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