aura-mus: Implement Deactivate().

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc

 // Copyright (c) 2012 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 "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
@@ skipping 464 matching lines @@
   x11_window_move_client_.reset(new X11DesktopWindowMoveClient);
   aura::client::SetWindowMoveClient(window(), x11_window_move_client_.get());
 
   SetWindowTransparency();
 
   native_widget_delegate_->OnNativeWidgetCreated(true);
 }
 
 void DesktopWindowTreeHostX11::OnWidgetInitDone() {}
 
+void DesktopWindowTreeHostX11::OnNativeWidgetActivationChanged(bool active) {}
+
 std::unique_ptr<corewm::Tooltip> DesktopWindowTreeHostX11::CreateTooltip() {
   return base::WrapUnique(new corewm::TooltipAura);
 }
 
 std::unique_ptr<aura::client::DragDropClient>
 DesktopWindowTreeHostX11::CreateDragDropClient(
     DesktopNativeCursorManager* cursor_manager) {
   drag_drop_client_ = new DesktopDragDropClientAuraX11(
       window(), cursor_manager, xdisplay_, xwindow_);
   drag_drop_client_->Init();
@@ skipping 1860 matching lines @@
 
 // static
 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
   return new DesktopWindowTreeHostX11(native_widget_delegate,
                                       desktop_native_widget_aura);
 }
 
 }  // namespace views