aura-mus: Implement Deactivate().

ui/views/widget/desktop_aura/desktop_native_widget_aura.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_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 1086 matching lines @@
     // widgets gets aura activation changes. Only when desktop native widget is
     // active, we can rely on aura activation to restore focused view.
     if (GetWidget()->IsActive())
       GetWidget()->GetFocusManager()->RestoreFocusedView();
   } else if (lost_active == content_window_ && GetWidget()->HasFocusManager()) {
     DCHECK(!restore_focus_on_activate_);
     restore_focus_on_activate_ = true;
     // Pass in false so that ClearNativeFocus() isn't invoked.
     GetWidget()->GetFocusManager()->StoreFocusedView(false);
   }
+
+  // Give the native widget a chance to handle any specific changes it needs.
+  desktop_window_tree_host_->OnNativeWidgetActivationChanged(
+      content_window_ == gained_active);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopNativeWidgetAura, aura::client::FocusChangeObserver implementation:
 
 void DesktopNativeWidgetAura::OnWindowFocused(aura::Window* gained_focus,
                                               aura::Window* lost_focus) {
   if (content_window_ == gained_focus) {
     native_widget_delegate_->OnNativeFocus();
   } else if (content_window_ == lost_focus) {
@@ skipping 87 matching lines @@
   if (cursor_reference_count_ == 0) {
     // We are the last DesktopNativeWidgetAura instance, and we are responsible
     // for cleaning up |cursor_manager_|.
     delete cursor_manager_;
     native_cursor_manager_ = NULL;
     cursor_manager_ = NULL;
   }
 }
 
 }  // namespace views