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Non-translation transforms will change direction and/or scale, etc.
of offsets thus making subpixel accumulation through the transform
meaningless.

This CL addresses the issue in PaintLayerPainter and
PaintPropertyTreeBuilder. We still need to address the issue in
CompositedLayerMapping (crbug.com/716163).

BUG=710665
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2847873002
Cr-Commit-Position: refs/heads/master@{#468516}