Make glass frame inactive border color better approximate native behavior.

The existing blend color/alpha were not accurate.  Update them.  Also, it seems
unnecessary (and gives a behavioral cliff) to do very different things for light
and dark toolbar colors.

Instead, just always compute the inactive border as if it's being blended atop
the inactive frame color, which won't look bad since that color is in the
adjacent pixel.

This has the added bonus of being simpler as well.

Bug: 659451
Change-Id: I4fd2aa9d24af266b590c6dfcc2cbc7c0c96e2e86
Reviewed-on: https://chromium-review.googlesource.com/c/1404395
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622192}
1 file changed