Move enable extensions define to a build flag.

chrome/test/base/testing_browser_process.h

 // Copyright (c) 2012 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.
 
 // An implementation of BrowserProcess for unit tests that fails for most
 // services. By preventing creation of services, we reduce dependencies and
 // keep the profile clean. Clients of this class must handle the NULL return
 // value, however.
 
 #ifndef CHROME_TEST_BASE_TESTING_BROWSER_PROCESS_H_
 #define CHROME_TEST_BASE_TESTING_BROWSER_PROCESS_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part.h"
+#include "extensions/features/features.h"
 #include "printing/features/features.h"
 
 class BackgroundModeManager;
 class CRLSetFetcher;
 class IOThread;
 class MHTMLGenerationManager;
 class NotificationPlatformBridge;
 class NotificationUIManager;
 class PrefService;
 class WatchDogThread;
@@ skipping 155 matching lines @@
 #endif
 
   // The following objects are not owned by TestingBrowserProcess:
   PrefService* local_state_;
   IOThread* io_thread_;
   net::URLRequestContextGetter* system_request_context_;
   rappor::RapporService* rappor_service_;
 
   std::unique_ptr<BrowserProcessPlatformPart> platform_part_;
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   std::unique_ptr<MediaFileSystemRegistry> media_file_system_registry_;
 
   std::unique_ptr<extensions::ExtensionsBrowserClient>
       extensions_browser_client_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(TestingBrowserProcess);
 };
 
 // RAII (resource acquisition is initialization) for TestingBrowserProcess.
@@ skipping 13 matching lines @@
 class TestingBrowserProcessInitializer {
  public:
   TestingBrowserProcessInitializer();
   ~TestingBrowserProcessInitializer();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestingBrowserProcessInitializer);
 };
 
 #endif  // CHROME_TEST_BASE_TESTING_BROWSER_PROCESS_H_