Showing previews UI for Offline Previews

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageTabObserver.java

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.offlinepages;
 
 import android.content.Context;
 
 import org.chromium.base.Log;
 import org.chromium.base.VisibleForTesting;
@@ skipping 200 matching lines @@
     @VisibleForTesting
     boolean isObservingNetworkChanges() {
         return mIsObservingNetworkChanges;
     }
 
     @VisibleForTesting
     boolean isConnected() {
         return OfflinePageUtils.isConnected();
     }
 
+    @VisibleForTesting
+    boolean isShowingOfflinePreview(Tab tab) {
+        return OfflinePageUtils.isShowingOfflinePreview(tab);
+    }
+
     void maybeShowReloadSnackbar(Tab tab, boolean isNetworkEvent) {
+        // Exclude Offline Previews, as there is a seperate UI for previews.
         if (tab == null || tab.isFrozen() || tab.isHidden() || !tab.isOfflinePage()
-                || !isConnected() || !isLoadedTab(tab)
+                || isShowingOfflinePreview(tab) || !isConnected() || !isLoadedTab(tab)
                 || (wasSnackbarSeen(tab) && !isNetworkEvent)) {
             // Conditions to show a snackbar are not met.
             return;
         }
 
         showReloadSnackbar(tab);
         mObservedTabs.get(tab.getId()).wasSnackbarSeen = true;
     }
 
     @VisibleForTesting
     void showReloadSnackbar(Tab tab) {
         OfflinePageUtils.showReloadSnackbar(
                 mContext, mSnackbarManager, mSnackbarController, tab.getId());
     }
 
     @VisibleForTesting
     void startObservingNetworkChanges() {
         NetworkChangeNotifier.addConnectionTypeObserver(this);
     }
 
     @VisibleForTesting
     void stopObservingNetworkChanges() {
         NetworkChangeNotifier.removeConnectionTypeObserver(this);
     }
 }