aura-mus: Implement Deactivate().

services/ui/public/cpp/window_tree_client.cc

 // 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.
 
 #include "services/ui/public/cpp/window_tree_client.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 1391 matching lines @@
 
 void WindowTreeClient::WmCancelMoveLoop(uint32_t change_id) {
   if (!window_manager_delegate_ || change_id != current_wm_move_loop_change_)
     return;
 
   Window* window = GetWindowByServerId(current_wm_move_loop_window_id_);
   if (window)
     window_manager_delegate_->OnWmCancelMoveLoop(window);
 }
 
+void WindowTreeClient::WmDeactivateWindow(uint32_t window_id) {}
+
 void WindowTreeClient::OnAccelerator(uint32_t ack_id,
                                      uint32_t accelerator_id,
                                      std::unique_ptr<ui::Event> event) {
   DCHECK(event);
   const mojom::EventResult result =
       window_manager_delegate_->OnAccelerator(accelerator_id, *event.get());
   if (ack_id && window_manager_internal_client_)
     window_manager_internal_client_->OnAcceleratorAck(ack_id, result);
 }
 
@@ skipping 49 matching lines @@
     // TODO(riajiang): Figure out if |offset| needs to be converted.
     // (http://crbugs.com/646932)
     window_manager_internal_client_->SetUnderlaySurfaceOffsetAndExtendedHitArea(
         server_id(window), offset.x(), offset.y(),
         gfx::ConvertInsetsToDIP(ScaleFactorForDisplay(window->display_id()),
                                 hit_area));
   }
 }
 
 }  // namespace ui