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

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java
index e83811cbdd90329812aeee589ffc54d17be3a22f..f36c26bf43fd613b43d6bc89129571a0bc926766 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java
@@ -155,14 +155,6 @@ public class OfflinePageDownloadBridge implements DownloadServiceDelegate, Offli
         nativeDeleteItemByGuid(mNativeOfflinePageDownloadBridge, guid);
     }
 
-    /**
-     * See {@link #openItem(String, ComponentName)}.
-     */
-    @Override
-    public void openItem(String guid) {
-        openItem(guid, null);
-    }
-
     @Override
     public void destroyServiceDelegate() {
         destroy();
@@ -214,6 +206,23 @@ public class OfflinePageDownloadBridge implements DownloadServiceDelegate, Offli
         sIsTesting = isTesting;
     }
 
+    /**
+     * Waits for the download items to get loaded and opens the offline page identified by the GUID.
+     * @param GUID of the item to open.
+     */
+    public static void openDownloadedPage(final String guid) {
+        final OfflinePageDownloadBridge bridge =
+                new OfflinePageDownloadBridge(Profile.getLastUsedProfile());
+        bridge.addObserver(
+                new Observer() {
+                    @Override
+                    public void onItemsLoaded() {
+                        bridge.openItem(guid, null);
+                        bridge.destroyServiceDelegate();
+                    }
+                });
+    }
+
     @CalledByNative
     void downloadItemsLoaded() {
         mIsLoaded = true;