[DNS] Don't adjust the scroll position if the anchor element changes in size

third_party/WebKit/Source/core/layout/ScrollAnchor.h

Index: third_party/WebKit/Source/core/layout/ScrollAnchor.h
diff --git a/third_party/WebKit/Source/core/layout/ScrollAnchor.h b/third_party/WebKit/Source/core/layout/ScrollAnchor.h
index 510a7a463977654ef94943b200e1c44202dd8a92..75cb56a6a0df2c9e6afac65918336a39056cad84 100644
--- a/third_party/WebKit/Source/core/layout/ScrollAnchor.h
+++ b/third_party/WebKit/Source/core/layout/ScrollAnchor.h
@@ -85,8 +85,11 @@ private:
     // Which corner of m_anchorObject's bounding box to anchor to.
     Corner m_corner;
 
-    // Location of m_layoutObject relative to scroller at time of save().
+    // Location of m_anchorObject relative to scroller at time of save().
     LayoutPoint m_savedRelativeOffset;
+
+    // The size of the m_anchorObject at the time of save().
+    LayoutSize m_savedAnchorSize;
 };
 
 } // namespace blink