"Find" scrolling should be smoothly animated.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 1557 matching lines @@
       const LayoutBoxModelObject* container_block,
       LayoutUnit container_logical_height,
       LayoutUnit borders_plus_padding,
       LayoutUnit logical_height,
       const Length& logical_top,
       const Length& logical_bottom,
       const Length& margin_logical_top,
       const Length& margin_logical_bottom,
       LogicalExtentComputedValues&) const;
 
+  void ScrollRectToVisibleRecursive(const LayoutRect&,
+                                    const ScrollAlignment& align_x,
+                                    const ScrollAlignment& align_y,
+                                    ScrollType = kProgrammaticScroll,
+                                    bool make_visible_in_visual_viewport = true,
+                                    ScrollBehavior = kScrollBehaviorAuto);
+
   LayoutUnit FillAvailableMeasure(LayoutUnit available_logical_width) const;
   LayoutUnit FillAvailableMeasure(LayoutUnit available_logical_width,
                                   LayoutUnit& margin_start,
                                   LayoutUnit& margin_end) const;
 
   // Calculates the intrinsic(https://drafts.csswg.org/css-sizing-3/#intrinsic)
   // logical widths for this layout box.
   //
   // intrinsicWidth is defined as:
   //     intrinsic size of content (without our border and padding) +
@@ skipping 168 matching lines @@
          break_value == EBreakBetween::kLeft ||
          break_value == EBreakBetween::kPage ||
          break_value == EBreakBetween::kRecto ||
          break_value == EBreakBetween::kRight ||
          break_value == EBreakBetween::kVerso;
 }
 
 }  // namespace blink
 
 #endif  // LayoutBox_h