Move enable extensions define to a build flag.

chrome/browser/geolocation/geolocation_permission_context_extensions.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_EXTENSIONS_H_
 #define CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_EXTENSIONS_H_
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "components/content_settings/core/common/content_settings.h"
+#include "extensions/features/features.h"
 
 namespace content {
 class WebContents;
 }
 
 class GURL;
 class PermissionRequestID;
 class Profile;
 
 // Chrome extensions specific portions of GeolocationPermissionContext.
@@ skipping 12 matching lines @@
                         bool user_gesture,
                         const base::Callback<void(ContentSetting)>& callback,
                         bool* permission_set,
                         bool* new_permission);
 
   // Returns true if the cancellation request was handled.
   bool CancelPermissionRequest(content::WebContents* web_contents,
                                int bridge_id);
 
  private:
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   Profile* profile_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(GeolocationPermissionContextExtensions);
 };
 
 #endif  // CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_EXTENSIONS_H_