mus Window Server: implement event capture

components/mus/ws/operation.h

 // 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.
 
 #ifndef COMPONENTS_MUS_WS_OPERATION_H_
 #define COMPONENTS_MUS_WS_OPERATION_H_
 
 #include <set>
 
 #include "base/macros.h"
 #include "components/mus/common/types.h"
 
 namespace mus {
 namespace ws {
 
 class ConnectionManager;
 class WindowTreeImpl;
 
 enum class OperationType {
   NONE,
   ADD_TRANSIENT_WINDOW,
   ADD_WINDOW,
   DELETE_WINDOW,
   EMBED,
+  RELEASE_CAPTURE,
   REMOVE_TRANSIENT_WINDOW_FROM_PARENT,
   REMOVE_WINDOW_FROM_PARENT,
   REORDER_WINDOW,
+  SET_CAPTURE,
   SET_FOCUS,
   SET_WINDOW_BOUNDS,
   SET_WINDOW_PREDEFINED_CURSOR,
   SET_WINDOW_PROPERTY,
   SET_WINDOW_VISIBILITY,
 };
 
 // This class tracks the currently pending client-initiated operation.
 // This is typically used to suppress superfluous notifications generated
 // by suboperations in the window server.
@@ skipping 29 matching lines @@
   // See description of MarkConnectionAsMessaged/DidMessageConnection.
   std::set<ConnectionSpecificId> message_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(Operation);
 };
 
 }  // namespace ws
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_WS_OPERATION_H_