Ever since we moved to a bitmap font instead of using freetype, the backing image's dimensions are 43x9, not 50x12, and we might as well match. For example, the output will be exactly 43x9 pixels at 72DPI, or 86x18 pixels at 144DPI, etc. Change-Id: I99975cc780760b28b73fbf6d55befbe500f1a6e1 Reviewed-on: https://go-review.googlesource.com/11880 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>