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This replaces the png versions with vector images. In a local debug
build this saves about 15kb. Both vector images have the same content
except their colors. This could potentially be further optimized using
alpha blending so we only need the image once and it blends onto the
background.

Bug: 1013099,999976
Change-Id: Ic56b40c87dc5011a9babba787a3545b42df5d459
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1863025Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: Mitsuru Oshima (slow) <oshima@chromium.org>
Commit-Queue: Richard Knoll <knollr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709399}