Update WindowTree::OnWindowInputEventAck to include handled

components/mus/public/interfaces/window_tree.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;
 
 import "components/mus/public/interfaces/compositor_frame.mojom";
 import "components/mus/public/interfaces/cursor.mojom";
 import "components/mus/public/interfaces/input_events.mojom";
 import "components/mus/public/interfaces/mus_constants.mojom";
@@ skipping 228 matching lines @@
 
   // Set text input state for the given window.
   SetWindowTextInputState(uint32 window_id, mojo.TextInputState state);
 
   // Set the input method editor UI (software keyboard, etc) visibility.
   // If state is non-null, the specified window's text input state is updated.
   // Otherwise the existing state is used.
   SetImeVisibility(uint32 window_id, bool visible, mojo.TextInputState? state);
 
   // See documentation for WindowTreeClient::OnWindowInputEvent().
-  OnWindowInputEventAck(uint32 event_id);
+  OnWindowInputEventAck(uint32 event_id, bool handled);
 
   // See description of WindowManager for details.
   GetWindowManagerClient(associated WindowManagerClient& internal);
 };
 
 // Changes to windows are not sent to the connection that originated the
 // change. For example, if connection 1 changes the bounds of a window by
 // calling SetWindowBounds(), connection 1 does not receive
 // OnWindowBoundsChanged().
 interface WindowTreeClient {
@@ skipping 83 matching lines @@
   OnWindowDrawnStateChanged(uint32 window, bool drawn);
 
   // Invoked when a window property is changed. If this change is a removal,
   // |new_data| is null.
   OnWindowSharedPropertyChanged(uint32 window,
                                 string name,
                                 array<uint8>? new_data);
 
   // Invoked when an event is targeted at the specified window. The client must
   // call WindowTree::OnWindowInputEventAck() with the same |event_id| to notify
-  // that the event has been processed. The client will not receive farther
-  // events until the event is ack'ed.
+  // that the event has been processed, and with a boolean |handled| to notify
+  // if the event was consumed. The client will not receive farther events until
+  // the event is ack'ed.
   OnWindowInputEvent(uint32 event_id, uint32 window, Event event);
 
   OnWindowFocused(uint32 focused_window_id);
 
   OnWindowPredefinedCursorChanged(uint32 window_id, Cursor cursor_id);
 
   // A change initiated from the client has completed. See description of
   // change ids for details.
   OnChangeCompleted(uint32 change_id, bool success);
 
   // The WindowManager is requesting the specified window to close. If the
   // client allows the change it should delete the window.
   RequestClose(uint32 window_id);
 
   // See description of WindowManager for details.
   GetWindowManager(associated WindowManager& internal);
 };
 
 // Mus provides this interface as a way for clients to connect and obtain a
 // WindowTree handle with a supplied WindowTreeClient handle. The
 // WindowTreeClient has no roots, use NewTopLevelWindow() to create one.
 interface WindowTreeFactory {
   CreateWindowTree(WindowTree& tree_request, WindowTreeClient client);
 };