Add support for touch-action: manipulation

content/common/input/touch_action.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_COMMON_INPUT_TOUCH_ACTION_H_
 #define CONTENT_COMMON_INPUT_TOUCH_ACTION_H_
 
 namespace content {
 
 // The current touch action specifies what accelerated browser operations
 // (panning and zooming) are currently permitted via touch input.
 // See http://www.w3.org/TR/pointerevents/#the-touch-action-css-property.
 enum TouchAction {
   // All actions are pemitted (the default).
   TOUCH_ACTION_AUTO = 0,
 
   // No scrolling or zooming allowed.
   TOUCH_ACTION_NONE = 1 << 0,
 
   TOUCH_ACTION_PAN_X = 1 << 1,
 
   TOUCH_ACTION_PAN_Y = 1 << 2,
 
   TOUCH_ACTION_PAN_X_Y = TOUCH_ACTION_PAN_X | TOUCH_ACTION_PAN_Y,
 
-  TOUCH_ACTION_MAX = (1 << 3) - 1
+  TOUCH_ACTION_PINCH_ZOOM = 1 << 3,
+
+  TOUCH_ACTION_MANIPULATION = TOUCH_ACTION_PAN_X_Y | TOUCH_ACTION_PINCH_ZOOM,
+
+  TOUCH_ACTION_MAX = (1 << 4) - 1
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INPUT_TOUCH_ACTION_H_