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

third_party/WebKit/Source/core/page/Page.h

Index: third_party/WebKit/Source/core/page/Page.h
diff --git a/third_party/WebKit/Source/core/page/Page.h b/third_party/WebKit/Source/core/page/Page.h
index 9e0b4deb20bc9b51294c8a321de3b7336b3b2753..f1ef96350e2407cde1e8a7eafa692e92e82e6625 100644
--- a/third_party/WebKit/Source/core/page/Page.h
+++ b/third_party/WebKit/Source/core/page/Page.h
@@ -66,7 +66,6 @@
 class PointerLockController;
 class ScopedPageSuspender;
 class ScrollingCoordinator;
-class SmoothScrollSequencer;
 class Settings;
 class ConsoleMessageStorage;
 class SpellCheckerClient;
@@ -177,8 +176,6 @@
   void SetValidationMessageClient(ValidationMessageClient*);
 
   ScrollingCoordinator* GetScrollingCoordinator();
-
-  SmoothScrollSequencer* GetSmoothScrollSequencer();
 
   ClientRectList* NonFastScrollableRects(const LocalFrame*);
 
@@ -305,7 +302,6 @@
   const std::unique_ptr<PageScaleConstraintsSet> page_scale_constraints_set_;
   const Member<PointerLockController> pointer_lock_controller_;
   Member<ScrollingCoordinator> scrolling_coordinator_;
-  Member<SmoothScrollSequencer> smooth_scroll_sequencer_;
   const Member<BrowserControls> browser_controls_;
   const Member<ConsoleMessageStorage> console_message_storage_;
   const Member<EventHandlerRegistry> event_handler_registry_;