LayoutState doesn't need to store both layout and pagination offset.

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

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index 9bb04a993e62ab288ebeb0f8cc56f97fcd5c7f9d..c62fdc8632f18da5600b4615ae6b90e0ad6d292d 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -5259,10 +5259,8 @@ LayoutUnit LayoutBox::offsetFromLogicalTopOfFirstPage() const {
     return LayoutUnit();
 
   if (layoutState->layoutObject() == this) {
-    LayoutSize offsetDelta =
-        layoutState->layoutOffset() - layoutState->pageOffset();
-    return isHorizontalWritingMode() ? offsetDelta.height()
-                                     : offsetDelta.width();
+    LayoutSize offset = layoutState->paginationOffset();
+    return isHorizontalWritingMode() ? offset.height() : offset.width();
   }
 
   // A LayoutBlock always establishes a layout state, and this method is only