Move enable extensions define to a build flag.

chrome/browser/download/download_service_impl.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/download/download_service_impl.h"
 
 #include "base/callback.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/chrome_download_manager_delegate.h"
 #include "chrome/browser/download/download_history.h"
 #include "chrome/browser/download/download_status_updater.h"
 #include "chrome/browser/download/download_ui_controller.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/history/core/browser/history_service.h"
 #include "content/public/browser/download_manager.h"
+#include "extensions/features/features.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/api/downloads/downloads_api.h"
 #endif
 
 using content::BrowserContext;
 using content::DownloadManager;
 using content::DownloadManagerDelegate;
 
 DownloadServiceImpl::DownloadServiceImpl(Profile* profile)
     : download_manager_created_(false), profile_(profile) {
 }
@@ skipping 12 matching lines @@
   }
   download_manager_created_ = true;
 
   // In case the delegate has already been set by
   // SetDownloadManagerDelegateForTesting.
   if (!manager_delegate_.get())
     manager_delegate_.reset(new ChromeDownloadManagerDelegate(profile_));
 
   manager_delegate_->SetDownloadManager(manager);
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   extension_event_router_.reset(
       new extensions::ExtensionDownloadsEventRouter(profile_, manager));
 #endif
 
   if (!profile_->IsOffTheRecord()) {
     history::HistoryService* history = HistoryServiceFactory::GetForProfile(
         profile_, ServiceAccessType::EXPLICIT_ACCESS);
     history->GetNextDownloadId(
         manager_delegate_->GetDownloadIdReceiverCallback());
     download_history_.reset(new DownloadHistory(
@@ skipping 14 matching lines @@
 }
 
 DownloadHistory* DownloadServiceImpl::GetDownloadHistory() {
   if (!download_manager_created_) {
     GetDownloadManagerDelegate();
   }
   DCHECK(download_manager_created_);
   return download_history_.get();
 }
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 extensions::ExtensionDownloadsEventRouter*
 DownloadServiceImpl::GetExtensionEventRouter() {
   return extension_event_router_.get();
 }
 #endif
 
 bool DownloadServiceImpl::HasCreatedDownloadManager() {
   return download_manager_created_;
 }
 
@@ skipping 39 matching lines @@
 
 void DownloadServiceImpl::Shutdown() {
   if (download_manager_created_) {
     // Normally the DownloadManager would be shutdown later, after the Profile
     // goes away and BrowserContext's destructor runs. But that would be too
     // late for us since we need to use the profile (indirectly through history
     // code) when the DownloadManager is shutting down. So we shut it down
     // manually earlier. See http://crbug.com/131692
     BrowserContext::GetDownloadManager(profile_)->Shutdown();
   }
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   extension_event_router_.reset();
 #endif
   manager_delegate_.reset();
   download_history_.reset();
 }