Most of the compositing tiling tests are misbehaving when run in Chrome though their layer tree dump produced by DRT / NRWT (--platform chromium-gpu) is similar to Safari's. For example, on Windows, scrolling causes the scroll bar to disappear in certain regions. These failures need to be investigated. compositing/tiling/huge-layer-add-remove-child.html compositing/tiling/huge-layer-img.html compositing/tiling/huge-layer-with-layer-children.html compositing/tiling/huge-layer.html
These tests are now failing only on Mac: http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=compositing%2Ftiling%2Fhuge-layer-add-remove-child.html%2Ccompositing%2Ftiling%2Fhuge-layer-with-layer-children.html%2Ccompositing%2Ftiling%2Fhuge-layer.html&group=%40ToT%20GPU%20-%20chromium.org
LayoutTest failures for Chromium are being marked WontFix. The Bug is still accessible and referenced from TestExpectations.