[Media Router] Clean up issues related code.

chrome/browser/ui/webui/media_router/media_router_ui.cc

Index: chrome/browser/ui/webui/media_router/media_router_ui.cc
diff --git a/chrome/browser/ui/webui/media_router/media_router_ui.cc b/chrome/browser/ui/webui/media_router/media_router_ui.cc
index 6b8fba8c1a26b93c1b82aff983fbfd52999d5f3b..f8a4150b6ff257e684780affc15db628d27e9e80 100644
--- a/chrome/browser/ui/webui/media_router/media_router_ui.cc
+++ b/chrome/browser/ui/webui/media_router/media_router_ui.cc
@@ -485,7 +485,7 @@ void MediaRouterUI::CloseRoute(const MediaRoute::Id& route_id) {
 
 void MediaRouterUI::AddIssue(const Issue& issue) { router_->AddIssue(issue); }
 
-void MediaRouterUI::ClearIssue(const std::string& issue_id) {
+void MediaRouterUI::ClearIssue(const Issue::Id& issue_id) {
   router_->ClearIssue(issue_id);
 }
 
@@ -636,11 +636,8 @@ void MediaRouterUI::SendIssueForRouteTimeout(
       NOTREACHED();
   }
 
-  Issue issue(issue_title, std::string(),
-              IssueAction(IssueAction::TYPE_DISMISS),
-              std::vector<IssueAction>(), std::string(), Issue::NOTIFICATION,
-              false, -1);
-  AddIssue(issue);
+  AddIssue(Issue(issue_title, Issue::ActionType::DISMISS,
+                 Issue::Severity::NOTIFICATION));
 }
 
 void MediaRouterUI::SendIssueForUnableToCast(MediaCastMode cast_mode) {
@@ -652,10 +649,8 @@ void MediaRouterUI::SendIssueForUnableToCast(MediaCastMode cast_mode) {
                 IDS_MEDIA_ROUTER_ISSUE_UNABLE_TO_CAST_DESKTOP)
           : l10n_util::GetStringUTF8(
                 IDS_MEDIA_ROUTER_ISSUE_CREATE_ROUTE_TIMEOUT_FOR_TAB);
-  AddIssue(Issue(issue_title, std::string(),
-                 IssueAction(IssueAction::TYPE_DISMISS),
-                 std::vector<IssueAction>(), std::string(), Issue::WARNING,
-                 false, -1));
+  AddIssue(
+      Issue(issue_title, Issue::ActionType::DISMISS, Issue::Severity::WARNING));
 }
 
 GURL MediaRouterUI::GetFrameURL() const {