Don't let PaintInvalidationLocationChange shadow other reasons

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

Index: third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp b/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
index 12ce17b0c319397192da806f712b687abaec559a..ba4acad492869c8797857c75bf02ce3f29c3ef6a 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
@@ -394,13 +394,14 @@ void LayoutBoxModelObject::invalidateTreeIfNeeded(const PaintInvalidationState&
         return;
 
     LayoutRect previousPaintInvalidationRect = this->previousPaintInvalidationRect();
+    LayoutPoint previousPosition = previousPositionFromPaintInvalidationBacking();
     PaintInvalidationReason reason = invalidatePaintIfNeeded(newPaintInvalidationState);
     clearPaintInvalidationFlags(newPaintInvalidationState);
 
     if (reason == PaintInvalidationDelayedFull)
         paintInvalidationState.pushDelayedPaintInvalidationTarget(*this);
 
-    if (reason == PaintInvalidationLocationChange)
+    if (previousPosition != previousPositionFromPaintInvalidationBacking())
         newPaintInvalidationState.setForceSubtreeInvalidationWithinContainer();
 
     // TODO(wangxianzhu): Combine this function into LayoutObject::invalidateTreeIfNeeded() when removing the following workarounds.