bug 1046950 pt 1 - additional/modified APIs on LogicalSize. r=smontagu
bug 1046950 pt 2 - convert ComputeSize to use logical-coordinate parameters. r=smontagu
bug 1046950 pt 3 - convert ComputeAutoSize to use logical-coordinate parameters. r=smontagu
bug 1046950 pt 4 - convert ComputeSizeWithIntrinsicDimensions to logical-coord parameters. r=smontagu