Replace the current contiguity check for composited scrolling

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index 9b82eeac2feb0fb2eaea5c4891cf87222c11c9aa..99e83bdace92b40f07999c103795a477e3efb348 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -2393,15 +2393,6 @@ 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 ]