"Find" scrolling should be smoothly animated.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 632 matching lines @@
   }
   return false;
 }
 
 void LayoutBox::ScrollRectToVisible(const LayoutRect& rect,
                                     const ScrollAlignment& align_x,
                                     const ScrollAlignment& align_y,
                                     ScrollType scroll_type,
                                     bool make_visible_in_visual_viewport,
                                     ScrollBehavior scroll_behavior) {
+  SmoothScrollSequencer* sequencer =
+      GetFrame()->GetPage()->GetSmoothScrollSequencer();
+  sequencer->AbortAnimations();
+  ScrollRectToVisibleRecursive(rect, align_x, align_y, scroll_type,
+                               make_visible_in_visual_viewport,
+                               scroll_behavior);
+  if (scroll_behavior == kScrollBehaviorSmooth)
+    sequencer->RunQueuedAnimations();
+}
+
+void LayoutBox::ScrollRectToVisibleRecursive(
+    const LayoutRect& rect,
+    const ScrollAlignment& align_x,
+    const ScrollAlignment& align_y,
+    ScrollType scroll_type,
+    bool make_visible_in_visual_viewport,
+    ScrollBehavior scroll_behavior) {
   DCHECK(scroll_type == kProgrammaticScroll || scroll_type == kUserScroll);
   // Presumably the same issue as in setScrollTop. See crbug.com/343132.
   DisableCompositingQueryAsserts disabler;
 
   LayoutRect rect_to_scroll = rect;
   if (rect_to_scroll.Width() <= 0)
     rect_to_scroll.SetWidth(LayoutUnit(1));
   if (rect_to_scroll.Height() <= 0)
     rect_to_scroll.SetHeight(LayoutUnit(1));
 
@@ skipping 54 matching lines @@
   // scroll the parent.
   if (Style()->GetPosition() == EPosition::kFixed &&
       ContainerForFixedPosition() == View()) {
     return;
   }
 
   if (GetFrame()->GetPage()->GetAutoscrollController().AutoscrollInProgress())
     parent_box = EnclosingScrollableBox();
 
   if (parent_box) {
-    parent_box->ScrollRectToVisible(new_rect, align_x, align_y, scroll_type,
-                                    make_visible_in_visual_viewport,
-                                    scroll_behavior);
+    parent_box->ScrollRectToVisibleRecursive(
+        new_rect, align_x, align_y, scroll_type,
+        make_visible_in_visual_viewport, scroll_behavior);
   }
 }
 
 void LayoutBox::AbsoluteRects(Vector<IntRect>& rects,
                               const LayoutPoint& accumulated_offset) const {
   rects.push_back(PixelSnappedIntRect(accumulated_offset, Size()));
 }
 
 void LayoutBox::AbsoluteQuads(Vector<FloatQuad>& quads,
                               MapCoordinatesFlags mode) const {
@@ skipping 5203 matching lines @@
 void LayoutBox::MutableForPainting::
     SavePreviousContentBoxSizeAndLayoutOverflowRect() {
   auto& rare_data = GetLayoutBox().EnsureRareData();
   rare_data.has_previous_content_box_size_and_layout_overflow_rect_ = true;
   rare_data.previous_content_box_size_ = GetLayoutBox().ContentBoxRect().Size();
   rare_data.previous_layout_overflow_rect_ =
       GetLayoutBox().LayoutOverflowRect();
 }
 
 }  // namespace blink