Rename DesktopEngagement* to DesktopSessionDuration*.

chrome/browser/metrics/desktop_session_duration/desktop_session_duration_observer.cc

Index: chrome/browser/metrics/desktop_session_duration/desktop_session_duration_observer.cc
diff --git a/chrome/browser/metrics/desktop_engagement/desktop_engagement_observer.cc b/chrome/browser/metrics/desktop_session_duration/desktop_session_duration_observer.cc
similarity index 52%
rename from chrome/browser/metrics/desktop_engagement/desktop_engagement_observer.cc
rename to chrome/browser/metrics/desktop_session_duration/desktop_session_duration_observer.cc
index bf4dda506a1497d4808b5de3f1fd1a80eebb4b6b..595729be732a6bf5b2e5e605eee110cc4cdd9757 100644
--- a/chrome/browser/metrics/desktop_engagement/desktop_engagement_observer.cc
+++ b/chrome/browser/metrics/desktop_session_duration/desktop_session_duration_observer.cc
@@ -2,59 +2,60 @@
 // 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/desktop_engagement_observer.h"
+#include "chrome/browser/metrics/desktop_session_duration/desktop_session_duration_observer.h"
 
-#include "chrome/browser/metrics/desktop_engagement/desktop_engagement_service.h"
+#include "chrome/browser/metrics/desktop_session_duration/desktop_session_duration_tracker.h"
 #include "content/public/browser/render_view_host.h"
 
-DEFINE_WEB_CONTENTS_USER_DATA_KEY(metrics::DesktopEngagementObserver);
+DEFINE_WEB_CONTENTS_USER_DATA_KEY(metrics::DesktopSessionDurationObserver);
 
 namespace metrics {
 
-DesktopEngagementObserver::DesktopEngagementObserver(
+DesktopSessionDurationObserver::DesktopSessionDurationObserver(
     content::WebContents* web_contents,
-    DesktopEngagementService* service)
+    DesktopSessionDurationTracker* service)
     : content::WebContentsObserver(web_contents), service_(service) {
   RegisterInputEventObserver(web_contents->GetRenderViewHost());
 }
 
-DesktopEngagementObserver::~DesktopEngagementObserver() {}
+DesktopSessionDurationObserver::~DesktopSessionDurationObserver() {}
 
 // static
-DesktopEngagementObserver* DesktopEngagementObserver::CreateForWebContents(
+DesktopSessionDurationObserver*
+DesktopSessionDurationObserver::CreateForWebContents(
     content::WebContents* web_contents) {
   DCHECK(web_contents);
 
-  if (!DesktopEngagementService::IsInitialized())
+  if (!DesktopSessionDurationTracker::IsInitialized())
     return nullptr;
 
-  DesktopEngagementObserver* observer = FromWebContents(web_contents);
+  DesktopSessionDurationObserver* observer = FromWebContents(web_contents);
   if (!observer) {
-    observer = new DesktopEngagementObserver(web_contents,
-                                             DesktopEngagementService::Get());
+    observer = new DesktopSessionDurationObserver(
+        web_contents, DesktopSessionDurationTracker::Get());
     web_contents->SetUserData(UserDataKey(), observer);
   }
   return observer;
 }
 
-void DesktopEngagementObserver::RegisterInputEventObserver(
+void DesktopSessionDurationObserver::RegisterInputEventObserver(
     content::RenderViewHost* host) {
   if (host != nullptr)
     host->GetWidget()->AddInputEventObserver(this);
 }
 
-void DesktopEngagementObserver::UnregisterInputEventObserver(
+void DesktopSessionDurationObserver::UnregisterInputEventObserver(
     content::RenderViewHost* host) {
   if (host != nullptr)
     host->GetWidget()->RemoveInputEventObserver(this);
 }
 
-void DesktopEngagementObserver::OnInputEvent(
+void DesktopSessionDurationObserver::OnInputEvent(
     const blink::WebInputEvent& event) {
   service_->OnUserEvent();
 }
 
-void DesktopEngagementObserver::RenderViewHostChanged(
+void DesktopSessionDurationObserver::RenderViewHostChanged(
     content::RenderViewHost* old_host,
     content::RenderViewHost* new_host) {
   UnregisterInputEventObserver(old_host);