Flag for Background Loading of Offline Pages.

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

 // Copyright 2015 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.os.AsyncTask;
 
 import org.chromium.base.ObserverList;
 import org.chromium.base.ThreadUtils;
+import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.chrome.browser.ChromeFeatureList;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.components.offlinepages.DeletePageResult;
 import org.chromium.components.offlinepages.FeatureMode;
 import org.chromium.components.offlinepages.SavePageResult;
 import org.chromium.content_public.browser.WebContents;
 
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
 /**
  * Access gate to C++ side offline pages functionalities.
  */
 @JNINamespace("offline_pages::android")
 public class OfflinePageBridge {
     public static final String BOOKMARK_NAMESPACE = "bookmark";
     public static final long INVALID_OFFLINE_ID = 0;
+    private static final String OFFLINE_PAGES_BACKGROUND_LOADING_FEATURE_NAME =
+            "offline-pages-background-loading";
 
     /**
      * Retrieves the OfflinePageBridge for the given profile, creating it the first time
      * getForProfile is called for a given profile.  Must be called on the UI thread.
      *
      * @param profile The profile associated with the OfflinePageBridge to get.
      */
     public static OfflinePageBridge getForProfile(Profile profile) {
         ThreadUtils.assertOnUiThread();
 
@@ skipping 140 matching lines @@
     /**
      * @return True if the offline pages feature is enabled, regardless whether bookmark or saved
      *     page shown in UI strings.
      */
     public static boolean isEnabled() {
         ThreadUtils.assertOnUiThread();
         return getFeatureMode() != FeatureMode.DISABLED;
     }
 
     /**
+     * @return True if the offline pages feature is enabled, regardless whether bookmark or saved
+     *     page shown in UI strings.
+     */
+    @VisibleForTesting
+    public static boolean isBackgroundLoadingEnabled() {
+        return ChromeFeatureList.isEnabled(OFFLINE_PAGES_BACKGROUND_LOADING_FEATURE_NAME);
+    }
+
+    /**
      * @return True if an offline copy of the given URL can be saved.
      */
     public static boolean canSavePage(String url) {
         return nativeCanSavePage(url);
     }
 
     /**
      * Adds an observer to offline page model changes.
      * @param observer The observer to be added.
      */
@@ skipping 335 matching lines @@
     private native void nativeDeletePages(
             long nativeOfflinePageBridge, DeletePageCallback callback, long[] offlineIds);
     private native void nativeGetPagesToCleanUp(
             long nativeOfflinePageBridge, List<OfflinePageItem> offlinePages);
     private native void nativeCheckMetadataConsistency(long nativeOfflinePageBridge);
     private native String nativeGetOfflineUrlForOnlineUrl(
             long nativeOfflinePageBridge, String onlineUrl);
     private native void nativeRecordStorageHistograms(long nativeOfflinePageBridge,
             long totalSpaceInBytes, long freeSpaceInBytes, boolean reportingAfterDelete);
 }