IPH - Added triggers to show Download Home message

chrome/android/java/src/org/chromium/chrome/browser/download/DownloadManagerService.java

Index: chrome/android/java/src/org/chromium/chrome/browser/download/DownloadManagerService.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadManagerService.java b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadManagerService.java
index e80e93c9f2d958e2563c402045f2124557da8b95..89e68fba6f6d7c68b323d6469b538a9d19b6d724 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadManagerService.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadManagerService.java
@@ -34,6 +34,10 @@ import org.chromium.chrome.R;
 import org.chromium.chrome.browser.download.ui.BackendProvider;
 import org.chromium.chrome.browser.download.ui.DownloadHistoryAdapter;
 import org.chromium.chrome.browser.externalnav.ExternalNavigationDelegateImpl;
+import org.chromium.chrome.browser.feature_engagement_tracker.FeatureEngagementTrackerFactory;
+import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.components.feature_engagement_tracker.EventConstants;
+import org.chromium.components.feature_engagement_tracker.FeatureEngagementTracker;
 import org.chromium.components.offline_items_collection.ContentId;
 import org.chromium.components.offline_items_collection.LegacyHelpers;
 import org.chromium.net.ConnectionType;
@@ -1323,6 +1327,13 @@ public class DownloadManagerService extends BroadcastReceiver implements
             mDownloadSnackbarController.onDownloadSucceeded(
                     info, notificationId, systemDownloadId, canResolve, false);
         }
+
+        Profile profile = info.isOffTheRecord()
+                ? Profile.getLastUsedProfile().getOffTheRecordProfile()
+                : Profile.getLastUsedProfile().getOriginalProfile();
+        FeatureEngagementTracker tracker =
+                FeatureEngagementTrackerFactory.getFeatureEngagementTrackerForProfile(profile);
+        tracker.notifyEvent(EventConstants.DOWNLOAD_COMPLETED);
     }
 
     /**