Revert of 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 e63615720addbccc7c93ed2718f5a0cd18323630..1e27aa33c59e20760052252c01a90c90d2b5a75b 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.