Generalize layer mirroring for phantom windows

content/browser/renderer_host/render_widget_host_view_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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1842 matching lines @@
 
 void RenderWidgetHostViewAura::CreateAuraWindow() {
   DCHECK(!window_);
   window_ = new aura::Window(this);
   event_handler_->set_window(window_);
   window_observer_.reset(new WindowObserver(this));
 
   aura::client::SetTooltipText(window_, &tooltip_);
   aura::client::SetActivationDelegate(window_, this);
   aura::client::SetFocusChangeObserver(window_, this);
-  window_->set_layer_owner_delegate(delegated_frame_host_.get());
   display::Screen::GetScreen()->AddObserver(this);
 }
 
 void RenderWidgetHostViewAura::UpdateCursorIfOverSelf() {
   if (host_->GetProcess()->FastShutdownStarted())
     return;
 
   aura::Window* root_window = window_->GetRootWindow();
   if (!root_window)
     return;
@@ skipping 507 matching lines @@
 
 void RenderWidgetHostViewAura::SetPopupChild(
     RenderWidgetHostViewAura* popup_child_host_view) {
   popup_child_host_view_ = popup_child_host_view;
   event_handler_->SetPopupChild(
       popup_child_host_view,
       popup_child_host_view ? popup_child_host_view->event_handler() : nullptr);
 }
 
 }  // namespace content