Generalize layer mirroring for phantom windows

ui/wm/core/window_animations.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/wm/core/window_animations.h"
 
 #include <math.h>
 
 #include <algorithm>
 #include <vector>
@@ skipping 66 matching lines @@
     WindowInvalid();
   }
 
   // Detach the current layers and create new layers for |window_|.
   // Stack the original layers above |window_| and its transient
   // children.  If the window has transient children, the original
   // layers will be moved above the top most transient child so that
   // activation change does not put the window above the animating
   // layer.
   void DetachAndRecreateLayers() {
-    layer_owner_ = RecreateLayers(window_, nullptr);
+    layer_owner_ = RecreateLayers(window_);
     if (window_->parent()) {
       const aura::Window::Windows& transient_children =
           GetTransientChildren(window_);
       aura::Window::Windows::const_iterator iter =
           std::find(window_->parent()->children().begin(),
                     window_->parent()->children().end(),
                     window_);
       DCHECK(iter != window_->parent()->children().end());
       aura::Window* topmost_transient_child = NULL;
       for (++iter; iter != window_->parent()->children().end(); ++iter) {
@@ skipping 562 matching lines @@
   // being accessed via Remote Desktop.
   if (ui::ScopedAnimationDurationScaleMode::duration_scale_mode() ==
       ui::ScopedAnimationDurationScaleMode::NON_ZERO_DURATION)
     return false;
 
   // Let the user decide whether or not to play the animation.
   return !gfx::Animation::ShouldRenderRichAnimation();
 }
 
 }  // namespace wm