[Touch Adjustment] Pass primary_pointer_type to WebGestureEvent and disable adjustment for stylus

third_party/WebKit/public/platform/WebGestureEvent.h

Index: third_party/WebKit/public/platform/WebGestureEvent.h
diff --git a/third_party/WebKit/public/platform/WebGestureEvent.h b/third_party/WebKit/public/platform/WebGestureEvent.h
index 9393d545ce3d6fa636c15364856f42b1bc549cd7..3a07ab2ef8c7b37c07a27b0cdc1c0fe5426d875d 100644
--- a/third_party/WebKit/public/platform/WebGestureEvent.h
+++ b/third_party/WebKit/public/platform/WebGestureEvent.h
@@ -39,6 +39,10 @@ class WebGestureEvent : public WebInputEvent {
   WebGestureDevice source_device;
   bool is_source_touch_event_set_non_blocking;
 
+  // The pointer type for the first touch point in the gesture.
+  WebPointerProperties::PointerType primary_pointer_type =
+      WebPointerProperties::PointerType::kUnknown;
+
   // If the WebGestureEvent has sourceDevice=WebGestureDeviceTouchscreen, this
   // field contains the unique identifier for the touch event that released
   // this event at TouchDispositionGestureFilter. If the WebGestureEvents was