Add missing checks that default search contains search term replacement.

chrome/browser/search_engines/template_url_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/search_engines/template_url_service.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/i18n/case_conversion.h"
@@ skipping 594 matching lines @@
         TemplateURLData data(default_from_prefs->data());
         data.created_by_policy = true;
         data.id = kInvalidTemplateURLID;
         TemplateURL* managed_default = new TemplateURL(profile_, data);
         AddNoNotify(managed_default, true);
         default_search_provider = managed_default;
       }
     }
     // Note that this saves the default search provider to prefs.
     if (!default_search_provider ||
-        !default_search_provider->IsExtensionKeyword())
+        (!default_search_provider->IsExtensionKeyword() &&
+         default_search_provider->SupportsReplacement()))
       SetDefaultSearchProviderNoNotify(default_search_provider);
   } else {
     // If we had a managed default, replace it with the synced default if
     // applicable, or the first provider of the list.
     const TemplateURL* synced_default = GetPendingSyncedDefaultSearchProvider();
     if (synced_default) {
       default_search_provider = synced_default;
       pending_synced_default_search_ = false;
     } else if (database_specified_a_default &&
                default_search_provider == NULL) {
@@ skipping 1376 matching lines @@
     // TODO(mpcomplete): If we allow editing extension keywords, then those
     // should be persisted to disk and synced.
     if (template_url->sync_guid().empty() &&
         !template_url->IsExtensionKeyword()) {
       template_url->data_.sync_guid = guid::GenerateGUID();
       if (service_.get())
         service_->UpdateKeyword(*template_url);
     }
   }
 }