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

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

Index: third_party/WebKit/Source/core/frame/LocalFrameView.h
diff --git a/third_party/WebKit/Source/core/frame/LocalFrameView.h b/third_party/WebKit/Source/core/frame/LocalFrameView.h
index d4dfe865e036d432c1487ca189582f08a5d32926..7c6e938645d12a4ff222f03da2c92d5a2613dc3e 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrameView.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrameView.h
@@ -51,7 +51,6 @@
 #include "platform/graphics/GraphicsLayerClient.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "platform/scroll/Scrollbar.h"
-#include "platform/scroll/SmoothScrollSequencer.h"
 #include "platform/wtf/Allocator.h"
 #include "platform/wtf/AutoReset.h"
 #include "platform/wtf/Forward.h"
@@ -471,15 +470,12 @@
   LayoutRect ScrollIntoView(const LayoutRect& rect_in_content,
                             const ScrollAlignment& align_x,
                             const ScrollAlignment& align_y,
-                            bool is_smooth,
                             ScrollType = kProgrammaticScroll) override;
 
   // The window that hosts the LocalFrameView. The LocalFrameView will
   // communicate scrolls and repaints to the host window in the window's
   // coordinate space.
   PlatformChromeClient* GetChromeClient() const;
-
-  SmoothScrollSequencer* GetSmoothScrollSequencer() const override;
 
   // Functions for child manipulation and inspection.
   bool IsSelfVisible() const {