Showing previews UI for Offline Previews

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

Index: chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageTabObserver.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageTabObserver.java b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageTabObserver.java
index 28749599ffd23977b2eb4bb1add408893fcc9f34..e1027e91bc3fd9a2f88705be679365bcd72c72a4 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageTabObserver.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageTabObserver.java
@@ -211,23 +211,29 @@ public class OfflinePageTabObserver
     @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