Provide a dedicated getter for the offset to a repeatable THEAD.

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

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2013 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
@@ skipping 714 matching lines @@
                             oldLogicalHeight != logicalHeight();
     layoutPositionedObjects(dimensionChanged);
 
     updateLayerTransformAfterLayout();
 
     // Layout was changed, so probably borders too.
     invalidateCollapsedBorders();
 
     computeOverflow(clientLogicalBottom());
     updateAfterLayout();
+
+    if (state.pageLogicalHeight()) {
+      m_blockOffsetToFirstRepeatableHeader =
+          state.pageLogicalOffset(*this, LayoutUnit());
+    }
   }
 
   // FIXME: This value isn't the intrinsic content logical height, but we need
   // to update the value as its used by flexbox layout. crbug.com/367324
   setIntrinsicContentLogicalHeight(contentLogicalHeight());
 
-  if (view()->layoutState()->pageLogicalHeight())
-    setPageLogicalOffset(
-        view()->layoutState()->pageLogicalOffset(*this, logicalTop()));
-
   m_columnLogicalWidthChanged = false;
   clearNeedsLayout();
 }
 
 void LayoutTable::invalidateCollapsedBorders() {
   m_collapsedBorders.clear();
   if (!collapseBorders())
     return;
 
   m_collapsedBordersValid = false;
@@ skipping 936 matching lines @@
 }
 
 LayoutUnit LayoutTable::paddingRight() const {
   if (collapseBorders())
     return LayoutUnit();
 
   return LayoutBlock::paddingRight();
 }
 
 }  // namespace blink