Revert of Implement Element.scrollIntoView for scroll-behavior: smooth.

third_party/WebKit/Source/core/frame/LocalFrameView.cpp

Index: third_party/WebKit/Source/core/frame/LocalFrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/LocalFrameView.cpp b/third_party/WebKit/Source/core/frame/LocalFrameView.cpp
index 0e838fd572eaefcb6bf245feb46d6d011c45ca7d..eb769944bd98255ff66d56033fe655caa5df2d80 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/LocalFrameView.cpp
@@ -2127,13 +2127,6 @@
   return &page->GetChromeClient();
 }
 
-SmoothScrollSequencer* LocalFrameView::GetSmoothScrollSequencer() const {
-  Page* page = GetFrame().GetPage();
-  if (!page)
-    return nullptr;
-  return page->GetSmoothScrollSequencer();
-}
-
 void LocalFrameView::ContentsResized() {
   if (frame_->IsMainFrame() && frame_->GetDocument()) {
     if (TextAutosizer* text_autosizer =
@@ -4617,20 +4610,14 @@
 LayoutRect LocalFrameView::ScrollIntoView(const LayoutRect& rect_in_content,
                                           const ScrollAlignment& align_x,
                                           const ScrollAlignment& align_y,
-                                          bool is_smooth,
                                           ScrollType scroll_type) {
   LayoutRect view_rect(VisibleContentRect());
   LayoutRect expose_rect = ScrollAlignment::GetRectToExpose(
       view_rect, rect_in_content, align_x, align_y);
   if (expose_rect != view_rect) {
-    ScrollOffset target_offset(expose_rect.X().ToFloat(),
-                               expose_rect.Y().ToFloat());
-    if (is_smooth) {
-      DCHECK(scroll_type == kProgrammaticScroll);
-      GetSmoothScrollSequencer()->QueueAnimation(this, target_offset);
-    } else {
-      SetScrollOffset(target_offset, scroll_type);
-    }
+    SetScrollOffset(
+        ScrollOffset(expose_rect.X().ToFloat(), expose_rect.Y().ToFloat()),
+        scroll_type);
   }
 
   // Scrolling the LocalFrameView cannot change the input rect's location