Protect references to ThemeService* with ENABLE_THEMES

chrome/browser/extensions/extension_service.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/extensions/extension_service.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 1855 matching lines @@
     extension_paths[info->at(i)->extension_id] = info->at(i)->extension_path;
 
   if (!BrowserThread::PostTask(
           BrowserThread::FILE, FROM_HERE,
           base::Bind(
               &extension_file_util::GarbageCollectExtensions,
               install_directory_,
               extension_paths)))
     NOTREACHED();
 
+#if defined(ENABLE_THEMES)
   // Also garbage-collect themes.  We check |profile_| to be
   // defensive; in the future, we may call GarbageCollectExtensions()
   // from somewhere other than Init() (e.g., in a timer).
   if (profile_) {
     ThemeServiceFactory::GetForProfile(profile_)->RemoveUnusedThemes();
   }
+#endif
 }
 
 void ExtensionService::SyncExtensionChangeIfNeeded(const Extension& extension) {
   if (app_sync_bundle_.HandlesApp(extension)) {
     app_sync_bundle_.SyncChangeIfNeeded(extension);
   } else if (extension_sync_bundle_.HandlesExtension(extension)) {
     extension_sync_bundle_.SyncChangeIfNeeded(extension);
   }
 }
 
@@ skipping 668 matching lines @@
 
   // To coexist with certain unit tests that don't have a work-thread message
   // loop available at ExtensionService shutdown, we lazy-initialize this
   // object so that those cases neither create nor destroy an
   // APIResourceController.
   if (!api_resource_controller_.get()) {
     api_resource_controller_.reset(new extensions::APIResourceController());
   }
   return api_resource_controller_.get();
 }