Fix adding displays in mustash.

services/ui/ws/display_manager.cc

 // Copyright 2016 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_manager.h"
 
 #include "base/memory/ptr_util.h"
 #include "services/ui/display/platform_screen.h"
 #include "services/ui/ws/display.h"
 #include "services/ui/ws/display_binding.h"
@@ skipping 128 matching lines @@
   DCHECK_LT(id, next_root_id_);
   return RootWindowId(id);
 }
 
 void DisplayManager::OnDisplayAcceleratedWidgetAvailable(Display* display) {
   DCHECK_NE(0u, pending_displays_.count(display));
   DCHECK_EQ(0u, displays_.count(display));
   const bool is_first_display = displays_.empty();
   displays_.insert(display);
   pending_displays_.erase(display);
-  if (is_first_display)
-    window_server_->OnDisplayReady(display, is_first_display);
+  window_server_->OnDisplayReady(display, is_first_display);
 }
 
 void DisplayManager::OnActiveUserIdChanged(const UserId& previously_active_id,
                                            const UserId& active_id) {
   WindowManagerState* previous_window_manager_state =
       window_server_->GetWindowManagerStateForUser(previously_active_id);
   gfx::Point mouse_location_on_screen;
   if (previous_window_manager_state) {
     mouse_location_on_screen = previous_window_manager_state->event_dispatcher()
                                    ->mouse_pointer_last_location();
@@ skipping 25 matching lines @@
   // TODO(kylechar): What if the display is still pending?
 }
 
 void DisplayManager::OnDisplayModified(int64_t id, const gfx::Rect& bounds) {
   // TODO(kylechar): Implement.
   NOTREACHED();
 }
 
 }  // namespace ws
 }  // namespace ui