Menu hook plumbed through to RequestCoordinator.

chrome/browser/android/offline_pages/request_coordinator_factory.cc

 // Copyright 2016 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.
 
 #include "chrome/browser/android/offline_pages/request_coordinator_factory.h"
 
 #include <memory>
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/android/offline_pages/prerendering_offliner_factory.h"
@@ skipping 27 matching lines @@
   std::unique_ptr<OfflinerFactory> prerendererOffliner(
       new PrerenderingOfflinerFactory(context));
   // TODO(petewil) Add support for server based offliner when it is ready.
 
   return new RequestCoordinator(std::move(policy),
                                 std::move(prerendererOffliner));
 }
 
 content::BrowserContext* RequestCoordinatorFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
-  // TODO(petewil): Implement.
-  return nullptr;
+  // TODO(petewil): Make sure we support incognito properly.
+  return context;
 }
 
 }  // namespace offline_pages