Rename DesktopEngagement* to DesktopSessionDuration*.

chrome/browser/metrics/desktop_session/audible_contents_tracker_browsertest.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 "chrome/browser/metrics/desktop_engagement/audible_contents_tracker.h"
+#include "chrome/browser/metrics/desktop_session/audible_contents_tracker.h"
 
 #include "base/path_service.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/test/browser_test_base.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 // Observer for testing AudibleContentsTracker.
@@ skipping 57 matching lines @@
   // Wait until the audio starts.
   while (!audio_observer->is_audio_playing()) {
     base::RunLoop().RunUntilIdle();
   }
 
   // Wait until the audio stops.
   while (audio_observer->is_audio_playing()) {
     base::RunLoop().RunUntilIdle();
   }
 }