[Feedback] Update strings per UX recommendations.

chrome/browser/extensions/api/feedback_private/feedback_private_api.cc

 // Copyright 2013 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/api/feedback_private/feedback_private_api.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/lazy_instance.h"
@@ skipping 136 matching lines @@
 
 // static
 base::Closure* FeedbackPrivateGetStringsFunction::test_callback_ = NULL;
 
 bool FeedbackPrivateGetStringsFunction::RunSync() {
   std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
 
 #define SET_STRING(id, idr) \
   dict->SetString(id, l10n_util::GetStringUTF16(idr))
   SET_STRING("page-title", IDS_FEEDBACK_REPORT_PAGE_TITLE);
+  SET_STRING("additionalInfo", IDS_FEEDBACK_ADDITIONAL_INFO_LABEL);
   SET_STRING("page-url", IDS_FEEDBACK_REPORT_URL_LABEL);
   SET_STRING("screenshot", IDS_FEEDBACK_SCREENSHOT_LABEL);
   SET_STRING("user-email", IDS_FEEDBACK_USER_EMAIL_LABEL);
 #if defined(OS_CHROMEOS)
   const arc::ArcAuthService* auth_service = arc::ArcAuthService::Get();
   if (auth_service && auth_service->IsArcEnabled()) {
     SET_STRING("sys-info",
                IDS_FEEDBACK_INCLUDE_SYSTEM_INFORMATION_AND_METRICS_CHKBOX_ARC);
   } else {
     SET_STRING("sys-info",
@@ skipping 166 matching lines @@
       content::RecordAction(
           base::UserMetricsAction("Feedback.SrtPromptClosed"));
       break;
     default:
       return RespondNow(Error("Invalid arugment."));
   }
   return RespondNow(NoArguments());
 }
 
 }  // namespace extensions