Provide a better way of injecting extra diagnostics in feedbacks

chrome/browser/feedback/show_feedback_page.cc

Index: chrome/browser/feedback/show_feedback_page.cc
diff --git a/chrome/browser/feedback/show_feedback_page.cc b/chrome/browser/feedback/show_feedback_page.cc
index b9967abe8ea74169a6bf856eacf238bb759d0f32..f2f9466711ed87e66818ec63c5e9a25a59e7bbe1 100644
--- a/chrome/browser/feedback/show_feedback_page.cc
+++ b/chrome/browser/feedback/show_feedback_page.cc
@@ -21,7 +21,8 @@ namespace chrome {
 void ShowFeedbackPage(Browser* browser,
                       FeedbackSource source,
                       const std::string& description_template,
-                      const std::string& category_tag) {
+                      const std::string& category_tag,
+                      const std::string& extra_diagnostics) {
   GURL page_url;
   if (browser) {
     page_url = GetTargetTabUrl(browser->session_id().id(),
@@ -47,7 +48,7 @@ void ShowFeedbackPage(Browser* browser,
       extensions::FeedbackPrivateAPI::GetFactoryInstance()->Get(profile);
 
   api->RequestFeedbackForFlow(
-      description_template, category_tag, page_url,
+      description_template, category_tag, extra_diagnostics, page_url,
       source == kFeedbackSourceSadTabPage
           ? feedback_private::FeedbackFlow::FEEDBACK_FLOW_SADTABCRASH
           : feedback_private::FeedbackFlow::FEEDBACK_FLOW_REGULAR);