Makes display roots be destroyed by client

services/ui/public/cpp/window_tree_client.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/public/cpp/window_tree_client.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 1205 matching lines @@
 void WindowTreeClient::OnConnect(ClientSpecificId client_id) {
   client_id_ = client_id;
 }
 
 void WindowTreeClient::WmNewDisplayAdded(const display::Display& display,
                                          mojom::WindowDataPtr root_data,
                                          bool parent_drawn) {
   WmNewDisplayAddedImpl(display, std::move(root_data), parent_drawn);
 }
 
+void WindowTreeClient::WmDisplayRemoved(int64_t display_id) {
+  DCHECK(window_manager_delegate_);
+
+  for (Window* root : roots_) {
+    if (root->display_id() == display_id) {
+      window_manager_delegate_->OnWmDisplayRemoved(root);
+      return;
+    }
+  }
+}
+
 void WindowTreeClient::WmSetBounds(uint32_t change_id,
                                        Id window_id,
                                        const gfx::Rect& transit_bounds) {
   Window* window = GetWindowByServerId(window_id);
   bool result = false;
   if (window) {
     DCHECK(window_manager_delegate_);
     gfx::Rect bounds = transit_bounds;
     result = window_manager_delegate_->OnWmSetBounds(window, &bounds);
     if (result) {
@@ skipping 146 matching lines @@
     Window* window,
     const gfx::Vector2d& offset,
     const gfx::Insets& hit_area) {
   if (window_manager_internal_client_) {
     window_manager_internal_client_->SetUnderlaySurfaceOffsetAndExtendedHitArea(
         server_id(window), offset.x(), offset.y(), hit_area);
   }
 }
 
 }  // namespace ui