Open offline page instead of download home when clicking OPEN button on snackbar

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

Index: chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
index b1eae15591a407831b1b75b2d5b63101cdef30bf..83bbc83c85b5503330af0f1eef055900f72b2212 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotificationService.java
@@ -505,8 +505,9 @@ public class DownloadNotificationService extends Service {
                         : (intent.getAction() == ACTION_DOWNLOAD_OPEN
                                 ? DownloadSharedPreferenceEntry.ITEM_TYPE_OFFLINE_PAGE
                                 : DownloadSharedPreferenceEntry.ITEM_TYPE_DOWNLOAD);
-                DownloadServiceDelegate downloadServiceDelegate = getServiceDelegate(itemType);
-                boolean destroyImmediately = true;
+                DownloadServiceDelegate downloadServiceDelegate =
+                        intent.getAction() == ACTION_DOWNLOAD_OPEN ? null
+                                : getServiceDelegate(itemType);
                 switch (intent.getAction()) {
                     case ACTION_DOWNLOAD_CANCEL:
                         // TODO(qinmin): Alternatively, we can delete the downloaded content on
@@ -532,25 +533,14 @@ public class DownloadNotificationService extends Service {
                         resumeAllPendingDownloads();
                         break;
                     case ACTION_DOWNLOAD_OPEN:
-                        final OfflinePageDownloadBridge bridge =
-                                (OfflinePageDownloadBridge) downloadServiceDelegate;
-                        destroyImmediately = false;
-                        bridge.addObserver(
-                                new OfflinePageDownloadBridge.Observer() {
-                                    @Override
-                                    public void onItemsLoaded() {
-                                        String guid = IntentUtils.safeGetStringExtra(
-                                                intent, EXTRA_DOWNLOAD_GUID);
-                                        bridge.openItem(guid);
-                                        bridge.destroyServiceDelegate();
-                                    }
-                                });
+                        OfflinePageDownloadBridge.openDownloadedPage(
+                                IntentUtils.safeGetStringExtra(intent, EXTRA_DOWNLOAD_GUID));
                         break;
                     default:
                         Log.e(TAG, "Unrecognized intent action.", intent);
                         break;
                 }
-                if (destroyImmediately) {
+                if (intent.getAction() != ACTION_DOWNLOAD_OPEN) {
                     downloadServiceDelegate.destroyServiceDelegate();
                 }
             }