Add AcceleratorType to EventMatcher

components/mus/public/interfaces/input_event_constants.mojom

 // Copyright 2014 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.
 
 module mus.mojom;
 
+// Denotes during which phase of event targeting that an accelerator will be
+// notified of an event. PRE_TARGET will be notified instead of the target
+// window. POST_TARGET will be notified after the target window, and only if the
+// event was not consumed by the target.
+enum AcceleratorPhase {
+  PRE_TARGET,
+  POST_TARGET,
+};
+
 enum EventType {
   UNKNOWN,
   KEY_PRESSED,
   KEY_RELEASED,
   POINTER_CANCEL,
   POINTER_DOWN,
   POINTER_MOVE,
   POINTER_UP,
   MOUSE_EXIT,
   WHEEL,
@@ skipping 29 matching lines @@
   PEN,
   TOUCH,
 };
 
 enum WheelMode {
   PIXEL,
   LINE,
   PAGE,
   SCALING,
 };