Use the original paint invalidation path for sync painting v1

third_party/WebKit/Source/core/layout/LayoutObject.cpp

Index: third_party/WebKit/Source/core/layout/LayoutObject.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.cpp b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
index 33ebe5d70e5514d82cfa6dbdc943c3469146d4cd..e808104586ba148b45faa0a50bf821f0501df340 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
@@ -1194,7 +1194,7 @@ static void invalidatePaintRectangleOnWindow(const LayoutBoxModelObject& paintIn
 
 void LayoutObject::invalidatePaintUsingContainer(const LayoutBoxModelObject& paintInvalidationContainer, const LayoutRect& dirtyRect, PaintInvalidationReason invalidationReason) const
 {
-    if (RuntimeEnabledFeatures::slimmingPaintSynchronizedPaintingEnabled())
+    if (RuntimeEnabledFeatures::slimmingPaintV2Enabled())
         return;
 
     if (paintInvalidationContainer.frameView()->shouldThrottleRendering())
@@ -1446,29 +1446,6 @@ PaintInvalidationReason LayoutObject::invalidatePaintIfNeeded(PaintInvalidationS
     return invalidationReason;
 }
 
-void LayoutObject::invalidatePaintIfNeededForSynchronizedPainting(const PaintInfo& paintInfo)
-{
-    ASSERT(RuntimeEnabledFeatures::slimmingPaintSynchronizedPaintingEnabled());
-    ASSERT(document().lifecycle().state() == DocumentLifecycle::InPaint);
-    ASSERT(paintInfo.paintInvalidationState);
-    ASSERT(paintInfo.paintContainer());
-
-    PaintController& paintController = paintInfo.context->paintController();
-    if (paintController.clientHasCheckedPaintInvalidation(displayItemClient())) {
-        ASSERT(paintController.clientCacheIsValid(displayItemClient())
-            == (invalidatePaintIfNeeded(*paintInfo.paintInvalidationState, *paintInfo.paintContainer()) == PaintInvalidationNone));
-        return;
-    }
-
-    PaintInvalidationReason reason = invalidatePaintIfNeeded(*paintInfo.paintInvalidationState, *paintInfo.paintContainer());
-    clearPaintInvalidationState(*paintInfo.paintInvalidationState);
-
-    if (reason == PaintInvalidationDelayedFull)
-        paintInfo.paintInvalidationState->pushDelayedPaintInvalidationTarget(*this);
-
-    paintController.setClientHasCheckedPaintInvalidation(displayItemClient());
-}
-
 PaintInvalidationReason LayoutObject::paintInvalidationReason(const LayoutBoxModelObject& paintInvalidationContainer,
     const LayoutRect& oldBounds, const LayoutPoint& oldPositionFromPaintInvalidationBacking,
     const LayoutRect& newBounds, const LayoutPoint& newPositionFromPaintInvalidationBacking) const