Refactor ChromeActivity references out of TabModelSelectorImpl

chrome/android/java/src/org/chromium/chrome/browser/document/DocumentActivity.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.annotation.TargetApi;
 import android.content.Intent;
 import android.os.Build;
 import android.text.TextUtils;
 
 import org.chromium.base.Log;
 import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.browser.fullscreen.ChromeFullscreenManager;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.document.ActivityDelegate;
 
 /**
  * Deprecated class for running Chrome in document mode.  Kept around to force users into the
  * correct {@link Activity}.
  */
 @TargetApi(Build.VERSION_CODES.LOLLIPOP)
 public class DocumentActivity extends ChromeActivity {
     // Legacy class names to match Chrome pre-44 activity names. See crbug.com/503807
@@ skipping 41 matching lines @@
      * both regular document activity and incognito document activity).
      * @param className The class name to inspect.
      * @return Whether the className is that of a document activity.
      */
     public static boolean isDocumentActivity(String className) {
         return TextUtils.equals(className, IncognitoDocumentActivity.class.getName())
                 || TextUtils.equals(className, DocumentActivity.class.getName())
                 || TextUtils.equals(className, LEGACY_CLASS_NAME)
                 || TextUtils.equals(className, LEGACY_INCOGNITO_CLASS_NAME);
     }
+
+    @Override
+    protected ChromeFullscreenManager createFullscreenManager() {
+        return null;
+    }
 }