Add ContentSuggestionsCategoryFactory; Store categories as ints

chrome/browser/ntp_snippets/ntp_snippets_service_factory.cc

 // 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.
 
 #include "chrome/browser/ntp_snippets/ntp_snippets_service_factory.h"
 
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
@@ skipping 103 matching lines @@
       profile->GetPath().Append(ntp_snippets::kDatabaseFolder));
   scoped_refptr<base::SequencedTaskRunner> task_runner =
       BrowserThread::GetBlockingPool()
           ->GetSequencedTaskRunnerWithShutdownBehavior(
               base::SequencedWorkerPool::GetSequenceToken(),
               base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
 
   ntp_snippets::NTPSnippetsService* ntp_snippets_service =
       new ntp_snippets::NTPSnippetsService(
           enabled, profile->GetPrefs(), suggestions_service,
+          content_suggestions_service->category_factory(),
           g_browser_process->GetApplicationLocale(), scheduler,
           base::MakeUnique<ntp_snippets::NTPSnippetsFetcher>(
               signin_manager, token_service, request_context,
               profile->GetPrefs(),
               base::Bind(&safe_json::SafeJsonParser::Parse),
               chrome::GetChannel() == version_info::Channel::STABLE),
           base::MakeUnique<ImageFetcherImpl>(
               base::MakeUnique<ImageDecoderImpl>(), request_context.get()),
           base::MakeUnique<ImageDecoderImpl>(),
           base::MakeUnique<ntp_snippets::NTPSnippetsDatabase>(database_dir,
                                                               task_runner),
           base::MakeUnique<ntp_snippets::NTPSnippetsStatusService>(
               signin_manager, sync_service, profile->GetPrefs()));
 
   if (content_suggestions_service->state() ==
       ContentSuggestionsService::State::ENABLED) {
     content_suggestions_service->RegisterProvider(ntp_snippets_service);
   }
   return ntp_snippets_service;
 }