Include-what-you-use for WrapUnique/MakeUnique.

services/ui/ws/user_activity_monitor.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/user_activity_monitor.h"
 
 #include "base/bind.h"
+#include "base/memory/ptr_util.h"
 #include "base/time/default_tick_clock.h"
 
 namespace ui {
 namespace ws {
 
 UserActivityMonitor::UserActivityMonitor(std::unique_ptr<base::TickClock> clock)
     : now_clock_(std::move(clock)) {
   if (!now_clock_)
     now_clock_ = base::WrapUnique(new base::DefaultTickClock);
   last_activity_ = now_clock_->NowTicks();
@@ skipping 107 matching lines @@
   idle_observers_.erase(std::remove_if(
       idle_observers_.begin(), idle_observers_.end(),
       [observer](
           const std::pair<IdleObserverInfo, mojom::UserIdleObserverPtr>& pair) {
         return pair.second.get() == observer;
       }));
 }
 
 }  // namespace ws
 }  // namespace ui