Revert of Reland Compile under-invalidation checking in all builds

third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in

Index: third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in
diff --git a/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in b/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in
index 0c7fba8f029b5a61ad997581121919af35c25e47..f07620a60f245f0da48450c3f111dbc66a725cf4 100644
--- a/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in
+++ b/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in
@@ -151,7 +151,6 @@
 OverlayScrollbars
 HideScrollbars settable_from_internals=True
 PagePopup status=stable
-PaintUnderInvalidationChecking settable_from_internals=True
 PassiveDocumentEventListeners status=experimental
 PassiveEventListenersDueToFling status=experimental
 PassPaintVisualRectToCompositor
@@ -200,6 +199,7 @@
 SlimmingPaintInvalidation implied_by=SlimmingPaintV2
 SlimmingPaintV2
 SlimmingPaintStrictCullRectClipping
+SlimmingPaintUnderInvalidationChecking settable_from_internals=True
 // Used as argument in attribute of stable-release functions/interfaces where
 // a runtime-enabled feature name is required for correct IDL syntax.
 // This is a global flag; do not change its status.