Bug 943846 - Don't constrain generated display-ports to composition bounds. r=kats
Bug 928806 - Allow SharedPlanarYCbCrImage images to optionally have padding
Overload YCbCrImageDataSerializer.InitializeBufferInfo to take explicit plane
offsets. Make SharedPlanarYCbCrImage::SetDataNoCopy set the offsets based on the
Y, Cb and Cr plane pointers passed by the caller. r=nical
Bug 949525 -  VP9 tests. r=cpearce