Emil Sjolander 61848ea2f3 Fix percentage calculation when parent size is undefined
Reviewed By: gkassabli

Differential Revision: D4494265

fbshipit-source-id: 9efef9e39a1b66af2d0f144575a96c919d60dbf7
2017-02-03 05:43:41 -08:00
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2017-02-01 14:14:32 -08:00