Move enable extensions define to a build flag.

chrome/browser/ui/sync/tab_contents_synced_tab_delegate.cc

 // 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.
 
 #include "chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h"
 
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/common/features.h"
 #include "components/sessions/content/content_serialized_navigation_builder.h"
 #include "components/sync_sessions/sync_sessions_client.h"
 #include "components/sync_sessions/synced_window_delegate.h"
 #include "components/sync_sessions/synced_window_delegates_getter.h"
 #include "content/public/browser/favicon_status.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/web_contents.h"
+#include "extensions/features/features.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/tab_helper.h"
 #include "extensions/common/extension.h"
 #endif
 
 #if BUILDFLAG(ENABLE_SUPERVISED_USERS)
 #include "chrome/browser/supervised_user/supervised_user_navigation_observer.h"
 #endif
 
 using content::NavigationEntry;
 
@@ skipping 25 matching lines @@
 
 SessionID::id_type TabContentsSyncedTabDelegate::GetSessionId() const {
   return SessionTabHelper::FromWebContents(web_contents_)->session_id().id();
 }
 
 bool TabContentsSyncedTabDelegate::IsBeingDestroyed() const {
   return web_contents_->IsBeingDestroyed();
 }
 
 std::string TabContentsSyncedTabDelegate::GetExtensionAppId() const {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   const scoped_refptr<const extensions::Extension> extension_app(
       extensions::TabHelper::FromWebContents(web_contents_)->extension_app());
   if (extension_app.get())
     return extension_app->id();
 #endif
   return std::string();
 }
 
 bool TabContentsSyncedTabDelegate::IsInitialBlankNavigation() const {
   return web_contents_->GetController().IsInitialBlankNavigation();
@@ skipping 79 matching lines @@
   for (int i = 0; i < entry_count; ++i) {
     const GURL& virtual_url = GetVirtualURLAtIndex(i);
     if (!virtual_url.is_valid())
       continue;
 
     if (sessions_client->ShouldSyncURL(virtual_url))
       return true;
   }
   return false;
 }