mus: Introduce high-contrast mode in mus.

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 <vector>
 
 #include "base/debug/debugger.h"
@@ skipping 257 matching lines @@
       factory->user_id() == window_server_->user_id_tracker()->active_id();
   display_root->root()->SetVisible(is_active);
   display_root->window_manager_state()->window_tree()->AddRootForWindowManager(
       display_root->root());
 }
 
 ServerWindow* Display::GetRootWindow() {
   return root_.get();
 }
 
+bool Display::IsInHighContrastMode() {
+  return window_server_->IsActiveUserInHighContrastMode();
+}
+
 void Display::OnEvent(const ui::Event& event) {
   WindowManagerDisplayRoot* display_root = GetActiveWindowManagerDisplayRoot();
   if (display_root)
     display_root->window_manager_state()->ProcessEvent(event);
   window_server_
       ->GetUserActivityMonitorForUser(
           window_server_->user_id_tracker()->active_id())
       ->OnUserActivity();
 }
 
@@ skipping 122 matching lines @@
 }
 
 void Display::OnWindowManagerWindowTreeFactoryReady(
     WindowManagerWindowTreeFactory* factory) {
   if (!binding_)
     CreateWindowManagerDisplayRootFromFactory(factory);
 }
 
 }  // namespace ws
 }  // namespace ui