Add ScrollDirectionPhysical enum in Scroll types.

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index df2856fd1ab8fbcf96ace8e7ff2f9c7ed0862036..a5991c617e53526b6680d0eb7d31ac7b598f247f 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -3268,14 +3268,6 @@ void FrameView::setScrollOffset(const DoublePoint& offset)
     scrollTo(adjustScrollPositionWithinRange(offset));
 }
 
-bool FrameView::scroll(ScrollDirection direction, ScrollGranularity granularity, float delta)
-{
-    ScrollDirection physicalDirection =
-        toPhysicalDirection(direction, isVerticalDocument(), isFlippedDocument());
-
-    return ScrollableArea::scroll(physicalDirection, granularity, delta);
-}
-
 void FrameView::windowResizerRectChanged()
 {
     updateScrollbars(scrollOffsetDouble());