[Android] Revise handling of document-mode-only tests.

chrome/android/javatests/src/org/chromium/chrome/browser/document/DocumentModeReferrerTest.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.document;
 
 import android.app.Instrumentation;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Build;
 import android.provider.Browser;
 import android.test.suitebuilder.annotation.MediumTest;
 
 import org.chromium.base.test.util.MinAndroidSdkLevel;
 import org.chromium.chrome.browser.ChromeApplication;
 import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.TabModelSelectorTabObserver;
 import org.chromium.chrome.browser.tabmodel.document.DocumentTabModelSelector;
 import org.chromium.chrome.test.util.ApplicationTestUtils;
-import org.chromium.chrome.test.util.DisableInTabbedMode;
 import org.chromium.content.browser.test.util.Criteria;
 import org.chromium.content.browser.test.util.CriteriaHelper;
 import org.chromium.content_public.browser.LoadUrlParams;
 
 /**
  * Tests that Document mode handles referrers correctly.
  */
 @MinAndroidSdkLevel(Build.VERSION_CODES.LOLLIPOP)
-@DisableInTabbedMode
 public class DocumentModeReferrerTest extends DocumentModeTestBase {
     private static final int ACTIVITY_START_TIMEOUT = 1000;
 
     private String mUrl;
     private String mReferrer;
     private TabModelSelectorTabObserver mObserver;
 
     @Override
     public void tearDown() throws Exception {
         super.tearDown();
@@ skipping 207 matching lines @@
             @Override
             public boolean isSatisfied() {
                 return URL_1.equals(mUrl);
             }
         });
 
         // Check that referrer is not carried over
         assertEquals("http://www.google.com", mReferrer);
     }
 }