Text control elements should contain all (shadow DOM) children.

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

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 178 matching lines @@
   ASSERT(m_mapping.isEmpty() ||
          isTopmostLayoutView(m_mapping[0].m_layoutObject));
 }
 
 static bool canMapBetweenLayoutObjects(const LayoutObject& layoutObject,
                                        const LayoutObject& ancestor) {
   for (const LayoutObject* current = &layoutObject;;
        current = current->parent()) {
     const ComputedStyle& style = current->styleRef();
     if (style.position() == EPosition::kFixed ||
-        style.isFlippedBlocksWritingMode())
+        style.isFlippedBlocksWritingMode() ||
+        style.hasTransformRelatedProperty())
       return false;
 
-    if (current->style()->canContainFixedPositionObjects() ||
+    if (current->canContainFixedPositionObjects() ||
         current->isLayoutFlowThread() || current->isSVGRoot())
       return false;
 
     if (current == &ancestor)
       break;
 
     if (current->isFloatingWithNonContainingBlockParent())
       return false;
   }
 
@@ skipping 160 matching lines @@
   // If we're not working with multiple LayoutViews, then any view is considered
   // "topmost" (to preserve original behavior).
   if (!(m_mapCoordinatesFlags & TraverseDocumentBoundaries))
     return true;
 
   return layoutObject->frame()->isMainFrame();
 }
 #endif
 
 }  // namespace blink