Add support for touch-action: manipulation

content/browser/renderer_host/input/touch_action_filter.cc

Index: content/browser/renderer_host/input/touch_action_filter.cc
diff --git a/content/browser/renderer_host/input/touch_action_filter.cc b/content/browser/renderer_host/input/touch_action_filter.cc
index 80c85c3b91c9a44695f079a518e6de6757345e5c..32dc8f780c3a4ec6d7a4f117ddad8b83b2c3f98d 100644
--- a/content/browser/renderer_host/input/touch_action_filter.cc
+++ b/content/browser/renderer_host/input/touch_action_filter.cc
@@ -61,7 +61,8 @@ bool TouchActionFilter::FilterGestureEvent(WebGestureEvent* gesture_event) {
 
     case WebInputEvent::GesturePinchBegin:
       DCHECK(!drop_pinch_gesture_events_);
-      if (allowed_touch_action_ == TOUCH_ACTION_AUTO) {
+      if (allowed_touch_action_ == TOUCH_ACTION_AUTO ||
+          allowed_touch_action_ | TOUCH_ACTION_PINCH_ZOOM) {
         // Pinch events are always bracketed by scroll events, and the W3C
         // standard touch-action provides no way to disable scrolling without
         // also disabling pinching.