Initial touch-action main thread implementation

public/web/WebWidgetClient.h

 /*
  * Copyright (C) 2009 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 18 matching lines @@
  */
 
 #ifndef WebWidgetClient_h
 #define WebWidgetClient_h
 
 #include "WebNavigationPolicy.h"
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebLayerTreeView.h"
 #include "public/platform/WebRect.h"
 #include "public/platform/WebScreenInfo.h"
+#include "public/web/WebTouchAction.h"
 
 namespace blink {
 
 class WebGestureEvent;
 class WebString;
 class WebWidget;
 struct WebCursorInfo;
 struct WebSize;
 
 class WebWidgetClient {
@@ skipping 116 matching lines @@
 
     // Returns true iff the pointer is locked to this widget.
     virtual bool isPointerLocked() { return false; }
 
     // Called when a gesture event is handled.
     virtual void didHandleGestureEvent(const WebGestureEvent& event, bool eventCancelled) { }
 
     // Called to update if touch events should be sent.
     virtual void hasTouchEventHandlers(bool) { }
 
+    // Called during WebWidget::HandleInputEvent for a TouchStart event to inform the embedder
+    // of the touch actions that are permitted for this touch.
+    virtual void setTouchAction(WebTouchAction touchAction) { }
+
 protected:
     ~WebWidgetClient() { }
 };
 
 } // namespace blink
 
 #endif