Serve offline page for online URL on disconnected or bad networks

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

 // Copyright 2014 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.tab;
 
 import android.app.Activity;
 import android.app.Application;
 import android.content.Context;
 import android.content.Intent;
@@ skipping 2875 matching lines @@
      * Shows the list of offline pages. This should only be hit when offline pages feature is
      * enabled.
      */
     @CalledByNative
     public void showOfflinePages() {
         // TODO(jianli): This is not currently used. Figure out what to do here.
         // http://crbug.com/636574
     }
 
     /**
-     * @return Original url of the tab, if tab currently displays offline copy, would return url of
-     * the original page. Otherwise return the original url from DOMDistiller.
+     * @return Original url of the tab, which is the original url from DOMDistiller.
      */
     public String getOriginalUrl() {
-        OfflinePageItem offlinePage = getOfflinePage();
-        if (offlinePage != null) return offlinePage.getUrl();
         return DomDistillerUrlUtils.getOriginalUrlFromDistillerUrl(getUrl());
     }
 
     /**
      * If a Lo-Fi snackbar has not been shown yet for this page load, a Lo-Fi snackbar is shown.
      *
      * @param isPreview Whether the Lo-Fi response was a preview response.
      */
     @CalledByNative
     public void onLoFiResponseReceived(boolean isPreview) {
@@ skipping 352 matching lines @@
     private native void nativeSetInterceptNavigationDelegate(long nativeTabAndroid,
             InterceptNavigationDelegate delegate);
     private native void nativeAttachToTabContentManager(long nativeTabAndroid,
             TabContentManager tabContentManager);
     private native void nativeAttachOverlayWebContents(
             long nativeTabAndroid, WebContents webContents, boolean visible);
     private native void nativeDetachOverlayWebContents(
             long nativeTabAndroid, WebContents webContents);
     private native boolean nativeHasPrerenderedUrl(long nativeTabAndroid, String url);
 }