aura-mus: Implement Deactivate().

ui/views/widget/desktop_aura/desktop_window_tree_host_win.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_win.h"
 
 #include "base/memory/ptr_util.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 141 matching lines @@
   window()->SetProperty(kDesktopWindowTreeHostKey, this);
 
   should_animate_window_close_ =
       content_window_->type() != ui::wm::WINDOW_TYPE_NORMAL &&
       !wm::WindowAnimationsDisabled(content_window_);
 
 // TODO this is not invoked *after* Init(), but should be ok.
   SetWindowTransparency();
 }
 
+void DesktopWindowTreeHostWin::OnNativeWidgetActivationChanged(bool active) {}
+
 void DesktopWindowTreeHostWin::OnWidgetInitDone() {}
 
 std::unique_ptr<corewm::Tooltip> DesktopWindowTreeHostWin::CreateTooltip() {
   DCHECK(!tooltip_);
   tooltip_ = new corewm::TooltipWin(GetAcceleratedWidget());
   return base::WrapUnique(tooltip_);
 }
 
 std::unique_ptr<aura::client::DragDropClient>
 DesktopWindowTreeHostWin::CreateDragDropClient(
@@ skipping 817 matching lines @@
 
 // static
 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
   return new DesktopWindowTreeHostWin(native_widget_delegate,
                                       desktop_native_widget_aura);
 }
 
 }  // namespace views