[Media Router] Consistently refer to issue's learn more help page by ID.

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

 // Copyright 2015 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/ui/webui/media_router/media_router_webui_message_handler.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 192 matching lines @@
   dictionary->SetString("title", issue.title());
   dictionary->SetString("message", issue.message());
   dictionary->SetInteger("defaultActionType", issue.default_action().type());
   if (!issue.secondary_actions().empty()) {
     dictionary->SetInteger("secondaryActionType",
                            issue.secondary_actions().begin()->type());
   }
   if (!issue.route_id().empty())
     dictionary->SetString("routeId", issue.route_id());
   dictionary->SetBoolean("isBlocking", issue.is_blocking());
+  if (issue.help_page_id() > 0)
+    dictionary->SetInteger("helpPageId", issue.help_page_id());
 
   return dictionary;
 }
 
 bool IsValidIssueActionTypeNum(int issue_action_type_num) {
   return issue_action_type_num >= 0 &&
          issue_action_type_num < IssueAction::TYPE_MAX;
 }
 
 // Composes a "learn more" URL. The URL depends on template arguments in |args|.
@@ skipping 237 matching lines @@
   }
 
   MediaRouterUI* media_router_ui =
       static_cast<MediaRouterUI*>(web_ui()->GetController());
   if (media_router_ui->HasPendingRouteRequest()) {
     DVLOG(1) << "UI already has pending route request. Ignoring.";
     Issue issue(
         l10n_util::GetStringUTF8(IDS_MEDIA_ROUTER_ISSUE_PENDING_ROUTE),
         std::string(), IssueAction(IssueAction::TYPE_DISMISS),
         std::vector<IssueAction>(), std::string(), Issue::NOTIFICATION,
-        false, std::string());
+        false, -1);
     media_router_ui_->AddIssue(issue);
     return;
   }
 
   DVLOG(2) << __FUNCTION__ << ": sink id: " << sink_id
            << ", cast mode: " << cast_mode_num;
 
   // TODO(haibinlu): Pass additional parameters into the CreateRoute request,
   // e.g. low-fps-mirror, user-override. (crbug.com/490364)
   if (!media_router_ui->CreateRoute(
@@ skipping 72 matching lines @@
   }
 
   MediaRouterUI* media_router_ui =
       static_cast<MediaRouterUI*>(web_ui()->GetController());
   if (media_router_ui->HasPendingRouteRequest()) {
     DVLOG(1) << "UI already has pending route request. Ignoring.";
     Issue issue(
         l10n_util::GetStringUTF8(IDS_MEDIA_ROUTER_ISSUE_PENDING_ROUTE),
         std::string(), IssueAction(IssueAction::TYPE_DISMISS),
         std::vector<IssueAction>(), std::string(), Issue::NOTIFICATION,
-        false, std::string());
+        false, -1);
     media_router_ui_->AddIssue(issue);
     return;
   }
 
   if (!media_router_ui_->ConnectRoute(sink_id, route_id)) {
     DVLOG(1) << "Error initiating route join request.";
   }
 }
 
 void MediaRouterWebUIMessageHandler::OnCloseRoute(const base::ListValue* args) {
@@ skipping 292 matching lines @@
 #endif  // defined(GOOGLE_CHROME_BUILD)
 
   return AccountInfo();
 }
 
 void MediaRouterWebUIMessageHandler::SetWebUIForTest(content::WebUI* web_ui) {
   set_web_ui(web_ui);
 }
 
 }  // namespace media_router