[mus]Add FrameGenerator::SetHighContrastMode(bool)

services/ui/ws/window_server.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/window_server.h"
 
 #include <set>
 #include <string>
 
 #include "base/logging.h"
@@ skipping 258 matching lines @@
 
 ServerWindow* WindowServer::GetFocusedWindow() {
   for (Display* display : display_manager_->displays()) {
     ServerWindow* focused_window = display->GetFocusedWindow();
     if (focused_window)
       return focused_window;
   }
   return nullptr;
 }
 
-bool WindowServer::IsActiveUserInHighContrastMode() const {
-  return IsUserInHighContrastMode(user_id_tracker_.active_id());
-}
-
 void WindowServer::SetHighContrastMode(const UserId& user, bool enabled) {
   // TODO(fsamuel): This doesn't really seem like it's a window server concept?
   if (IsUserInHighContrastMode(user) == enabled)
     return;
   high_contrast_mode_[user] = enabled;
+
+  if (user == user_id_tracker_.active_id()) {
+    // Propagate the change to all Displays so that FrameGenerators start
+    // requesting BeginFrames.
+    display_manager_->SetHighContrastMode(enabled);
+  }
 }
 
 uint32_t WindowServer::GenerateWindowManagerChangeId(
     WindowTree* source,
     uint32_t client_change_id) {
   const uint32_t wm_change_id = next_wm_change_id_++;
   in_flight_wm_change_map_[wm_change_id] = {source->id(), client_change_id};
   return wm_change_id;
 }
 
@@ skipping 556 matching lines @@
 void WindowServer::OnUserIdAdded(const UserId& id) {
   activity_monitor_map_[id] = base::MakeUnique<UserActivityMonitor>(nullptr);
 }
 
 void WindowServer::OnUserIdRemoved(const UserId& id) {
   activity_monitor_map_.erase(id);
 }
 
 }  // namespace ws
 }  // namespace ui