Add WebPointerEvent, WebMouseProperties and WebPointerProperties types.

public/web/WebTouchPoint.h

Index: public/web/WebTouchPoint.h
diff --git a/public/web/WebTouchPoint.h b/public/web/WebTouchPoint.h
index fc0231a5cab40a187d777ce808c233115d16969b..3386e18151100c6065f9a973241fa521d653a533 100644
--- a/public/web/WebTouchPoint.h
+++ b/public/web/WebTouchPoint.h
@@ -33,18 +33,20 @@
 
 #include "../platform/WebCommon.h"
 #include "../platform/WebFloatPoint.h"
+#include "WebMouseProperties.h"
+#include "WebPointerProperties.h"
 
 namespace blink {
 
-class WebTouchPoint {
+// TODO(e_hakkinen): Replace WebTouchEvent with WebPointerEvent and remove
+//                   WebTouchEvent and this.
+class WebTouchPoint : public WebMouseProperties, public WebPointerProperties {
 public:
     WebTouchPoint()
-        : id(0)
+        : WebMouseProperties()
+        , WebPointerProperties()
         , state(StateUndefined)
-        , radiusX(0)
-        , radiusY(0)
         , rotationAngle(0)
-        , force(0)
     {
     }
 
@@ -57,15 +59,11 @@ public:
         StateCancelled,
     };
 
-    int id;
     State state;
     WebFloatPoint screenPosition;
     WebFloatPoint position;
 
-    float radiusX;
-    float radiusY;
     float rotationAngle;
-    float force;
 };
 
 } // namespace blink