Adds ability for accelerators to add key/value pairs to KeyEvent

services/ui/public/interfaces/window_manager.mojom

 // Copyright 2015 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 ui.mojom;
 
 import "services/ui/public/interfaces/cursor.mojom";
 import "services/ui/public/interfaces/event_matcher.mojom";
 import "services/ui/public/interfaces/window_manager_constants.mojom";
 import "services/ui/public/interfaces/window_tree_constants.mojom";
@@ skipping 246 matching lines @@
   WmSetFrameDecorationValues(FrameDecorationValues values);
 
   // Sets the cursor that the non-client areas of the window should use.
   WmSetNonClientCursor(uint32 window_id, Cursor cursor_id);
 
   // Response from WmCreateTopLevelWindow() informing the client of the id for
   // the new window.
   OnWmCreatedTopLevelWindow(uint32 change_id, uint32 window_id);
 
   // See description in WindowManager::OnAccelerator(). |ack_id| is the value
-  // that was passed to OnAccelerator().
-  OnAcceleratorAck(uint32 ack_id, EventResult event_result);
+  // that was passed to OnAccelerator(). If the accelerator is a pre-target
+  // handler and |event_result| is UNHANDLED, then |properties| is added to
+  // the KeyEvent that is dispatched to the client with the focused window.
+  OnAcceleratorAck(uint32 ack_id,
+                   EventResult event_result,
+                   map<string, array<uint8>> properties);
 };