Flag for Background Loading of Offline Pages.

chrome/android/javatests/src/org/chromium/chrome/browser/offlinepages/OfflinePageBridgeTest.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.content.Context;
 import android.os.Environment;
 import android.test.suitebuilder.annotation.SmallTest;
 
@@ skipping 240 matching lines @@
     @SmallTest
     public void testGetOfflineUrlForOnlineUrl() throws Exception {
         loadUrl(mTestPage);
         savePage(SavePageResult.SUCCESS, mTestPage);
         OfflinePageItem offlinePage = mOfflinePageBridge.getPageByClientId(BOOKMARK_ID);
         assertEquals("We should get the same offline URL, when querying using online URL",
                 offlinePage.getOfflineUrl(),
                 mOfflinePageBridge.getOfflineUrlForOnlineUrl(offlinePage.getUrl()));
     }
 
+    @SmallTest
+    public void testBackgroundLoadSwitch() throws Exception {

[Ted C, 2016/03/14 22:16:41]

To be safe, wouldn't you want to add something like:

@CommandLineFlags.Add("disable-features=offline-pages-background-loading")

Seems like this test will fail as you change the default finch option, but maybe
you're fine with that.

+        // We should be able to call the C++ is enabled function from the Java side.
+        assertFalse("If background loading is off, we should see the feature disabled",
+                OfflinePageBridge.isBackgroundLoadingEnabled());
+    }
+
     private void savePage(final int expectedResult, final String expectedUrl)
             throws InterruptedException {
         final Semaphore semaphore = new Semaphore(0);
         ThreadUtils.runOnUiThreadBlocking(new Runnable() {
             @Override
             public void run() {
                 assertNotNull("Tab is null", getActivity().getActivityTab());
                 assertEquals("URL does not match requested.", mTestPage,
                         getActivity().getActivityTab().getUrl());
                 assertNotNull("WebContents is null",
@@ skipping 51 matching lines @@
 
     private void forceConnectivityStateOnUiThread(final boolean state) {
         ThreadUtils.runOnUiThreadBlocking(new Runnable() {
             @Override
             public void run() {
                 NetworkChangeNotifier.forceConnectivityState(state);
             }
         });
     }
 }