Convert Pass()→std::move() in //content (Android edition)

content/browser/media/android/media_session_uma_helper.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 "content/browser/media/android/media_session_uma_helper.h"
 
+#include <utility>
+
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/time/default_clock.h"
 
 namespace content {
 
 using HistogramBase = base::HistogramBase;
 
 MediaSessionUmaHelper::MediaSessionUmaHelper()
     : clock_(new base::DefaultClock())
@@ skipping 30 matching lines @@
 
   if (total_active_time_.is_zero())
     return;
 
   UMA_HISTOGRAM_LONG_TIMES("Media.Session.ActiveTime", total_active_time_);
   total_active_time_ = base::TimeDelta();
 }
 
 void MediaSessionUmaHelper::SetClockForTest(
     scoped_ptr<base::Clock> testing_clock) {
-  clock_ = testing_clock.Pass();
+  clock_ = std::move(testing_clock);
 }
 
 }  // namespace content