Remove unnecessary anonymous blocks when splitting anonymous boxes

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

Index: third_party/WebKit/Source/core/layout/LayoutBlock.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlock.cpp b/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
index 02862b5680802995c8ede1a25394cd3c54b7488b..cfb941d73364834f4cd148b52b28bc13bb53916f 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
@@ -655,6 +655,11 @@ void LayoutBlock::collapseAnonymousBlockChild(LayoutBlock* parent, LayoutBlock*
     // destroyed. See crbug.com/282088
     if (child->beingDestroyed())
         return;
+    if (child->continuation())
+        return;
+    // Ruby elements use anonymous wrappers for ruby runs and ruby bases by design, so we don't remove them.
+    if (child->isRubyRun() || child->isRubyBase())
+        return;
     parent->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::ChildAnonymousBlockChanged);
 
     child->moveAllChildrenTo(parent, child->nextSibling(), child->hasLayer());