Add ScrollDirectionPhysical enum in Scroll types.

Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 443 matching lines @@
     void detachCompositorAnimationTimeline(WebCompositorAnimationTimeline*);
 
     virtual void setVisibilityState(WebPageVisibilityState, bool) override;
 
     PopupContainer* selectPopup() const { return m_selectPopup.get(); }
     bool hasOpenedPopup() const { return m_selectPopup || m_pagePopup; }
 
     // Returns true if the event leads to scrolling.
     static bool mapKeyCodeForScroll(
         int keyCode,
-        ScrollDirection*,
+        ScrollDirectionPhysical*,
         ScrollGranularity*);
 
     // Called by a full frame plugin inside this view to inform it that its
     // zoom level has been updated.  The plugin should only call this function
     // if the zoom change was triggered by the browser, it's only needed in case
     // a plugin can update its own zoom, say because of its own UI.
     void fullFramePluginZoomLevelChanged(double zoomLevel);
 
     void computeScaleAndScrollForBlockRect(const WebPoint& hitPoint, const WebRect& blockRect, float padding, float defaultScaleWhenAlreadyLegible, float& scale, WebPoint& scroll);
     Node* bestTapNode(const GestureEventWithHitTestResults& targetedTapEvent);
@@ skipping 297 matching lines @@
 };
 
 DEFINE_TYPE_CASTS(WebViewImpl, WebWidget, widget, widget->isWebView(), widget.isWebView());
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 } // namespace blink
 
 #endif