Replace various ScrollableArea scroll methods with setScrollPosition

Source/core/page/SpatialNavigation.cpp

 /*
  * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Antonio Gomes <tonikitoo@webkit.org>
  *
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 197 matching lines @@
             dy = - ScrollableArea::pixelsPerLineStep();
             break;
         case WebFocusTypeDown:
             dy = ScrollableArea::pixelsPerLineStep();
             break;
         default:
             ASSERT_NOT_REACHED();
             return false;
         }
 
-        frame->view()->scrollBy(IntSize(dx, dy));
+        frame->view()->scrollBy(IntSize(dx, dy), UserScroll);
         return true;
     }
     return false;
 }
 
 bool scrollInDirection(Node* container, WebFocusType type)
 {
     ASSERT(container);
     if (container->isDocumentNode())
         return scrollInDirection(toDocument(container)->frame(), type);
@@ skipping 396 matching lines @@
     LayoutRect rect = virtualRectForDirection(type, rectToAbsoluteCoordinates(area.document().frame(), area.computeRect(area.imageElement()->layoutObject())), 1);
     return rect;
 }
 
 HTMLFrameOwnerElement* frameOwnerElement(FocusCandidate& candidate)
 {
     return candidate.isFrameOwnerElement() ? toHTMLFrameOwnerElement(candidate.visibleNode) : nullptr;
 };
 
 } // namespace blink