Replace the WAS_INSTALLED_BY_CUSTODIAN creation flag with a pref

chrome/browser/themes/theme_syncable_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/themes/theme_syncable_service.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/strings/stringprintf.h"
@@ skipping 217 matching lines @@
         return;
       }
       // An enabled theme extension with the given id was found, so
       // just set the current theme to it.
       theme_service_->SetTheme(extension);
     } else {
       // No extension with this id exists -- we must install it; we do
       // so by adding it as a pending extension and then triggering an
       // auto-update cycle.
       const bool kRemoteInstall = false;
-      const bool kInstalledByCustodian = false;
       if (!extensions_service->pending_extension_manager()->AddFromSync(
               id,
               update_url,
               base::Version(),
               &IsTheme,
-              kRemoteInstall,
-              kInstalledByCustodian)) {
+              kRemoteInstall)) {
         LOG(WARNING) << "Could not add pending extension for " << id;
         return;
       }
       extensions_service->CheckForUpdatesSoon();
     }
   } else if (theme_specifics.use_system_theme_by_default()) {
     DVLOG(1) << "Switch to use system theme";
     theme_service_->UseSystemTheme();
   } else {
     DVLOG(1) << "Switch to use default theme";
@@ skipping 84 matching lines @@
       syncer::SyncChange(FROM_HERE, change_type,
                          syncer::SyncData::CreateLocalData(
                              kCurrentThemeClientTag, kCurrentThemeNodeTitle,
                              entity_specifics)));
 
   DVLOG(1) << "Update theme specifics from current theme: "
       << changes.back().ToString();
 
   return sync_processor_->ProcessSyncChanges(FROM_HERE, changes);
 }