add pan-x and pan-y support to CSS touch-action parsing.

public/web/WebTouchAction.h

 /*
  * Copyright (C) 2013 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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebTouchAction_h
 #define WebTouchAction_h
 
 namespace blink {
 
 // Flags for permitted touch actions, specified in http://www.w3.org/TR/pointerevents/#the-touch-action-css-property.
 enum WebTouchAction {
-    WebTouchActionNone = 0,
-    WebTouchActionAuto
+    WebTouchActionAuto = 0x0,
+    WebTouchActionNone = 0x1,
+    WebTouchActionPanX = 0x2,
+    WebTouchActionPanY = 0x4
 };
+inline WebTouchAction operator| (WebTouchAction a, WebTouchAction b) { return WebTouchAction(int(a) | int(b)); }
+inline WebTouchAction& operator|= (WebTouchAction& a, WebTouchAction b) { return a = a | b; }
+inline WebTouchAction operator& (WebTouchAction a, WebTouchAction b) { return WebTouchAction(int(a) & int(b)); }
+inline WebTouchAction& operator&= (WebTouchAction& a, WebTouchAction b) { return a = a & b; }
+
 
 } // namespace blink
 
 #endif