NOT FOR REVIEW - Update comp-scrolling state at a well defined point in the pipeline.

LayoutTests/TestExpectations

 # See http://trac.webkit.org/wiki/TestExpectations for more information on this file.
 
 webkit.org/b/79679 [ Win Debug ] virtual/gpu/fast/canvas/getPutImageDataPairTest.html [ Slow ]
 crbug.com/24182 [ Debug ] css3/flexbox/multiline-justify-content.html [ Slow ]
 webkit.org/b/82097 [ Debug ] editing/selection/move-by-word-visually-crash-test-5.html [ Slow ]
 webkit.org/b/92287 fast/canvas/webgl/context-creation-and-destruction.html [ Pass Timeout Failure ]
 webkit.org/b/92287 virtual/gpu/fast/canvas/webgl/context-creation-and-destruction.html [ Pass Timeout Failure ]
 crbug.com/24182 [ Debug ] fast/css/large-list-of-rules-crash.html [ Slow ]
 crbug.com/24182 [ Debug ] fast/dom/shadow/tree-scope-crash.html [ Slow ]
 crbug.com/24182 [ Debug ] fast/dom/Window/window-postmessage-clone-really-deep-array.html [ Slow ]
@@ skipping 1940 matching lines @@
 webkit.org/b/92968 http/tests/appcache/abort-cache-onchecking-manifest-404.html
 webkit.org/b/92968 http/tests/appcache/abort-cache-onchecking-resource-404.html
 webkit.org/b/92968 http/tests/appcache/abort-cache-ondownloading-resource-404.html
 webkit.org/b/92968 http/tests/appcache/abort-cache-onchecking.html
 webkit.org/b/92968 http/tests/appcache/abort-cache-ondownloading.html
 webkit.org/b/92968 http/tests/appcache/abort-cache-onprogress.html
 
 # Scrolling content draws beneath scrollbars in composited scrolling mode.
 webkit.org/b/103156 virtual/gpu/compositedscrolling/scrollbars/custom-scrollbar-with-incomplete-style.html [ ImageOnlyFailure ]
 
-# Adding new failing layout tests to illustrate the need for a future logic fix.
-# Will be fixed in upcoming patch.
-crbug.com/172875 compositing/overflow/automatically-opt-into-composited-scrolling.html [ Failure ]
-crbug.com/172875 compositing/overflow/opt-into-composited-scrolling-positioned-ancestor.html [ Failure ]
-crbug.com/172875 virtual/gpu/compositedscrolling/overflow/automatically-opt-into-composited-scrolling.html [ Failure ]
-crbug.com/172875 virtual/gpu/compositedscrolling/overflow/opt-into-composited-scrolling-positioned-ancestor.html [ Failure ]
-crbug.com/172875 virtual/softwarecompositing/overflow/automatically-opt-into-composited-scrolling.html [ Failure ]
-crbug.com/172875 virtual/softwarecompositing/overflow/opt-into-composited-scrolling-positioned-ancestor.html [ Failure ]
-
 # Will need updated baselines with the opt-in fixes.
 crbug.com/234482 [ Linux Win Mac ] virtual/gpu/compositedscrolling/overflow/overflow-scroll.html [ Failure ]
 
 # Fails due to Bug 85856.
 webkit.org/b/85856 [ Win Mac ] fast/block/float/028.html [ ImageOnlyFailure ]
 webkit.org/b/85856 [ Win Mac ] fast/block/float/026.html [ ImageOnlyFailure ]
 webkit.org/b/85856 [ Win Mac ] fast/overflow/unreachable-overflow-rtl-bug.html [ Failure ImageOnlyFailure ]
 webkit.org/b/85856 [ Linux Win SnowLeopard ] scrollbars/rtl/div-absolute.html [ Failure ]
 webkit.org/b/85856 [ Linux Win SnowLeopard ] virtual/gpu/compositedscrolling/scrollbars/rtl/div-absolute.html [ Failure ]
 webkit.org/b/85856 [ Lion MountainLion ] scrollbars/rtl/div-absolute.html [ Failure Pass ]
@@ skipping 694 matching lines @@
 crbug.com/234758 [ Debug ] virtual/gpu/fast/canvas/canvas-strokePath-gradient-shadow.html [ Pass Timeout ]
 
 crbug.com/169374 compositing/backface-visibility/backface-visibility-non3d.html [ ImageOnlyFailure ]
 crbug.com/169374 compositing/culling/tile-occlusion-boundaries.html [ ImageOnlyFailure ]
 crbug.com/169374 transforms/3d/point-mapping/3d-point-mapping-coplanar.html [ ImageOnlyFailure ]
 crbug.com/169374 transforms/3d/point-mapping/3d-point-mapping-overlapping.html [ ImageOnlyFailure ]
 crbug.com/169374 transitions/default-timing-function.html [ ImageOnlyFailure ]
 
 # started failing in r149321/r149322
 crbug.com/236555 fast/forms/calendar-picker/week-picker-key-operations.html [ Failure ]