IPH - Added triggers for Download page

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

Index: chrome/android/java/src/org/chromium/chrome/browser/download/DownloadUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadUtils.java
index e5dc7328d46e9df58bdd66e180e4cdd917f8347e..45fb196f55901f7c88f2098789f27e38c97f42e4 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadUtils.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadUtils.java
@@ -39,6 +39,7 @@ import org.chromium.chrome.browser.download.ui.BackendProvider;
 import org.chromium.chrome.browser.download.ui.BackendProvider.DownloadDelegate;
 import org.chromium.chrome.browser.download.ui.DownloadFilter;
 import org.chromium.chrome.browser.download.ui.DownloadHistoryItemWrapper;
+import org.chromium.chrome.browser.feature_engagement_tracker.FeatureEngagementTrackerFactory;
 import org.chromium.chrome.browser.offlinepages.DownloadUiActionFlags;
 import org.chromium.chrome.browser.offlinepages.OfflinePageBridge;
 import org.chromium.chrome.browser.offlinepages.downloads.OfflinePageDownloadBridge;
@@ -46,6 +47,8 @@ import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
 import org.chromium.chrome.browser.tabmodel.document.TabDelegate;
 import org.chromium.chrome.browser.util.IntentUtils;
+import org.chromium.components.feature_engagement_tracker.EventConstants;
+import org.chromium.components.feature_engagement_tracker.FeatureEngagementTracker;
 import org.chromium.content_public.browser.DownloadState;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.ui.base.DeviceFormFactor;
@@ -216,6 +219,11 @@ public class DownloadUtils {
             bridge.destroy();
             DownloadUtils.recordDownloadPageMetrics(tab);
         }
+
+        FeatureEngagementTracker tracker =
+                FeatureEngagementTrackerFactory.getFeatureEngagementTrackerForProfile(
+                        tab.getProfile());
+        tracker.notifyEvent(EventConstants.DOWNLOAD_PAGE_STARTED);
     }
 
     /**