Use physical pixels for display root ServerWindow.

services/ui/ws/display.cc

 // Copyright 2015 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/display.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 17 matching lines @@
 #include "services/ui/ws/window_tree.h"
 #include "services/ui/ws/window_tree_binding.h"
 #include "ui/base/cursor/cursor.h"
 
 namespace ui {
 namespace ws {
 
 Display::Display(WindowServer* window_server,
                  const PlatformDisplayInitParams& platform_display_init_params)
     : window_server_(window_server), last_cursor_(mojom::Cursor::CURSOR_NULL) {
-  CreateRootWindow(platform_display_init_params.metrics.bounds.size());
+  CreateRootWindow(platform_display_init_params.metrics.pixel_size);
 
   // Pass the display root ServerWindow to PlatformDisplay.
   PlatformDisplayInitParams param_copy = platform_display_init_params;
   param_copy.root_window = root_.get();
   platform_display_.reset(PlatformDisplay::Create(param_copy));
   platform_display_->Init(this);
 
   window_server_->window_manager_window_tree_factory_set()->AddObserver(this);
   window_server_->user_id_tracker()->AddObserver(this);
 }
@@ skipping 351 matching lines @@
 }
 
 void Display::OnWindowManagerWindowTreeFactoryReady(
     WindowManagerWindowTreeFactory* factory) {
   if (!binding_)
     CreateWindowManagerDisplayRootFromFactory(factory);
 }
 
 }  // namespace ws
 }  // namespace ui