aura-mus: Implement Deactivate().

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/display/display.mojom";
 import "services/ui/public/interfaces/event_matcher.mojom";
 import "services/ui/public/interfaces/window_manager_constants.mojom";
@@ skipping 169 matching lines @@
   // Asks the WindowManager to interactively move the window. This will return
   // whether this completed successfully or not through the client's
   // OnWmMoveLoopCompleted().
   WmPerformMoveLoop(uint32 change_id, uint32 window_id,
                     MoveLoopSource source,
                     gfx.mojom.Point cursor_location);
 
   // Asks the WindowManager to cancel any outstanding move loop on |change_id|.
   WmCancelMoveLoop(uint32 change_id);
 
+  // Asks the WindowManager to change the activation from the current window
+  // to the next. The window manager may completely ignore this message.
+  WmDeactivateWindow(uint32 window_id);
+
   // An accelerator registered via AddAccelerator() has been triggered. If
   // |ack_id| is non-zero the accelerator matches a PRE_TARGET and must be
   // acknowledged by WindowManagerClient::OnAcceleratorAck().
   OnAccelerator(uint32 ack_id, uint32 accelerator_id, ui.mojom.Event event);
 };
 
 struct Accelerator {
   uint32 id;
   EventMatcher event_matcher;
 };
@@ skipping 43 matching lines @@
   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);
 };