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 1432240325fd570e797f6aa3ef3f0ce29cdc30b2..ada0d2034ca605c98509630843ef054fd306189c 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -3263,12 +3263,9 @@ void FrameView::setScrollOffset(const DoublePoint& offset)
     scrollTo(adjustScrollPositionWithinRange(offset));
 }
 
-bool FrameView::scroll(ScrollDirection direction, ScrollGranularity granularity, float delta)
+bool FrameView::scroll(ScrollDirectionPhysical direction, ScrollGranularity granularity, float delta)

[bokan, 2015/05/21 18:54:43]

Just remove FrameView::scroll and let callers use the base class version
directly.

 {
-    ScrollDirection physicalDirection =
-        toPhysicalDirection(direction, isVerticalDocument(), isFlippedDocument());
-
-    return ScrollableArea::scroll(physicalDirection, granularity, delta);
+    return ScrollableArea::scroll(direction, granularity, delta);
 }
 
 void FrameView::windowResizerRectChanged()