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

third_party/WebKit/Source/platform/scroll/ProgrammaticScrollAnimator.cpp

Index: third_party/WebKit/Source/platform/scroll/ProgrammaticScrollAnimator.cpp
diff --git a/third_party/WebKit/Source/platform/scroll/ProgrammaticScrollAnimator.cpp b/third_party/WebKit/Source/platform/scroll/ProgrammaticScrollAnimator.cpp
index 1ced72570e0c241a56b8311391f61ae8df638670..b717e08a653fad1d135766e18a01070cddfca373 100644
--- a/third_party/WebKit/Source/platform/scroll/ProgrammaticScrollAnimator.cpp
+++ b/third_party/WebKit/Source/platform/scroll/ProgrammaticScrollAnimator.cpp
@@ -10,7 +10,6 @@
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/scroll/ScrollableArea.h"
-#include "platform/scroll/SmoothScrollSequencer.h"
 #include "platform/wtf/PtrUtil.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCompositorSupport.h"
@@ -40,15 +39,12 @@
   NotifyOffsetChanged(offset);
 }
 
-void ProgrammaticScrollAnimator::AnimateToOffset(
-    const ScrollOffset& offset,
-    bool sequenced_for_smooth_scroll) {
+void ProgrammaticScrollAnimator::AnimateToOffset(const ScrollOffset& offset) {
   if (run_state_ == RunState::kPostAnimationCleanup)
     ResetAnimationState();
 
   start_time_ = 0.0;
   target_offset_ = offset;
-  sequenced_for_smooth_scroll_ = sequenced_for_smooth_scroll;
   animation_curve_ = CompositorScrollOffsetAnimationCurve::Create(
       CompositorOffsetFromBlinkOffset(target_offset_),
       CompositorScrollOffsetAnimationCurve::kScrollDurationDeltaBased);
@@ -80,7 +76,6 @@
 
   if (is_finished) {
     run_state_ = RunState::kPostAnimationCleanup;
-    AnimationFinished();
   } else if (!scrollable_area_->ScheduleAnimation()) {
     NotifyOffsetChanged(offset);
     ResetAnimationState();
@@ -174,16 +169,6 @@
     int group_id) {
   DCHECK_NE(run_state_, RunState::kRunningOnCompositorButNeedsUpdate);
   ScrollAnimatorCompositorCoordinator::CompositorAnimationFinished(group_id);
-  AnimationFinished();
-}
-
-void ProgrammaticScrollAnimator::AnimationFinished() {
-  if (sequenced_for_smooth_scroll_) {
-    sequenced_for_smooth_scroll_ = false;
-    if (SmoothScrollSequencer* sequencer =
-            GetScrollableArea()->GetSmoothScrollSequencer())
-      sequencer->RunQueuedAnimations();
-  }
 }
 
 DEFINE_TRACE(ProgrammaticScrollAnimator) {