Fix p3_ovals GM on high-DPI displays.

On a Mac with a retina display running Viewer, our canvas' total matrix
has a 2x scale factor applied. This change prevents an assertion from
occurring while viewing slides in Viewer.

(I tried actually compensating for the canvas scale factor as well, but
it didn't actually matter, because the canvas provided by Viewer doesn't
support readPixels either way.)

Change-Id: Ib378c79da96cea8d36815860889ca529d7314adc
Commit-Queue: John Stiles <>
Commit-Queue: Brian Osman <>
Auto-Submit: John Stiles <>
Reviewed-by: Brian Osman <>
1 file changed