Bug 874897 - Fix canvas copying of Ogg video frames with aspect ratio - r=jmuizelaar

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extra : rebase_source : 6f0e03c10de90b14d5bca5d7951af9eb7bced736
Bug 874897 - Mochitest for copying of frames of videos with aspect ratio to canvas - r=kinetik

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extra : rebase_source : c5ff10d61a1ea46b0fdb2a43e926405660493912