Use unified invalidation path for repaint-only style changes

Source/core/rendering/RenderBlock.cpp

Index: Source/core/rendering/RenderBlock.cpp
diff --git a/Source/core/rendering/RenderBlock.cpp b/Source/core/rendering/RenderBlock.cpp
index 2d0e66f81a8c87a706952ff95a8683d1e81f19b1..c9e5aab203235d08fed082c9b66035fecaadc26a 100644
--- a/Source/core/rendering/RenderBlock.cpp
+++ b/Source/core/rendering/RenderBlock.cpp
@@ -364,12 +364,10 @@ void RenderBlock::styleDidChange(StyleDifference diff, const RenderStyle* oldSty
 
 void RenderBlock::invalidateTreeIfNeeded(const PaintInvalidationState& paintInvalidationState)
 {
-    // Note, we don't want to early out here using shouldCheckForInvalidationAfterLayout as
-    // we have to make sure we go through any positioned objects as they won't be seen in
-    // the normal tree walk.
+    if (!shouldCheckForSelfOrChildPaintInvalidation())
+        return;
 
-    if (shouldCheckForPaintInvalidation())
-        RenderBox::invalidateTreeIfNeeded(paintInvalidationState);
+    RenderBox::invalidateTreeIfNeeded(paintInvalidationState);
 
     // Take care of positioned objects. This is required as PaintInvalidationState keeps a single clip rect.
     if (TrackedRendererListHashSet* positionedObjects = this->positionedObjects()) {