Rename DesktopEngagement* to DesktopSessionDuration*.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index b8fbba60c4b085a987d4d25be1919886374b6929..ca23f248921c2b57d23d9e9de25ebdb03385b9f4 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -2518,8 +2518,8 @@ test("browser_tests") {
     if (is_mac || is_win || (is_linux && !is_chromeos)) {
       sources += [
         # Tests for non mobile and non CrOS (includes Linux, Win, Mac).
-        "../browser/metrics/desktop_engagement/audible_contents_tracker_browsertest.cc",
-        "../browser/metrics/desktop_engagement/chrome_visibility_observer_browsertest.cc",
+        "../browser/metrics/desktop_session_duration/audible_contents_tracker_browsertest.cc",
+        "../browser/metrics/desktop_session_duration/chrome_visibility_observer_browsertest.cc",
         "../browser/profiles/profile_statistics_browsertest.cc",
       ]
     }
@@ -4630,7 +4630,7 @@ test("unit_tests") {
   if (!is_android && !is_chromeos) {
     sources += [
       "../browser/media/webrtc/native_desktop_media_list_unittest.cc",
-      "../browser/metrics/desktop_engagement/desktop_engagement_service_unittest.cc",
+      "../browser/metrics/desktop_session_duration/desktop_session_duration_tracker_unittest.cc",
       "../browser/signin/cross_device_promo_unittest.cc",
       "../browser/signin/signin_global_error_unittest.cc",
       "../browser/sync/sync_global_error_unittest.cc",