autotest: fix WindowManagerGraphicsCapture.
Lots of little issues addressed. I think people are removing our dependencies.
Somehow Image Magick convert can't handle postscript anymore. Also make sure
input to perceptualdiff is 8 bit as it chokes on default of 16.
BUG=27587,30316
TEST=Runs on lumpy.
Change-Id: I4a4b226c4a6a14c0be7e0cf77efe9ce7d1df88c9
Reviewed-on: https://gerrit.chromium.org/gerrit/21590
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Reviewed-by: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Ilja H. Friedel <ihf@chromium.org>
3 files changed
