Makes WindowTree::DeleteWindow() unembed for roots

services/ui/ws/server_window.cc

 // Copyright 2014 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 "services/ui/ws/server_window.h"
 
 #include <inttypes.h>
 #include <stddef.h>
 
 #include "base/strings/stringprintf.h"
@@ skipping 367 matching lines @@
 }
 
 void ServerWindow::SetUnderlayOffset(const gfx::Vector2d& offset) {
   if (offset == underlay_offset_)
     return;
 
   underlay_offset_ = offset;
   delegate_->OnScheduleWindowPaint(this);
 }
 
+void ServerWindow::OnEmbeddedAppDisconnected() {
+  FOR_EACH_OBSERVER(ServerWindowObserver, observers_,
+                    OnWindowEmbeddedAppDisconnected(this));
+}
+
 #if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)
 std::string ServerWindow::GetDebugWindowHierarchy() const {
   std::string result;
   BuildDebugInfo(std::string(), &result);
   return result;
 }
 
 std::string ServerWindow::GetDebugWindowInfo() const {
   std::string name = GetName();
   return base::StringPrintf(
@@ skipping 59 matching lines @@
 }
 
 // static
 ServerWindow** ServerWindow::GetStackingTarget(ServerWindow* window) {
   return &window->stacking_target_;
 }
 
 }  // namespace ws
 
 }  // namespace ui