[Media Router] Add a context menu item to access the chrome://cast page

chrome/browser/ui/toolbar/media_router_contextual_menu.cc

Index: chrome/browser/ui/toolbar/media_router_contextual_menu.cc
diff --git a/chrome/browser/ui/toolbar/media_router_contextual_menu.cc b/chrome/browser/ui/toolbar/media_router_contextual_menu.cc
index d0990e20b8568b7028064e75d5a44c9abf2a2855..fb473c1dc70a14027280650422622becb9421399 100644
--- a/chrome/browser/ui/toolbar/media_router_contextual_menu.cc
+++ b/chrome/browser/ui/toolbar/media_router_contextual_menu.cc
@@ -42,6 +42,8 @@ MediaRouterContextualMenu::MediaRouterContextualMenu(Browser* browser)
   menu_model_.AddItemWithStringId(IDC_MEDIA_ROUTER_REMOVE_TOOLBAR_ACTION,
                                   IDS_EXTENSIONS_UNINSTALL);
   menu_model_.AddSeparator(ui::NORMAL_SEPARATOR);
+  menu_model_.AddItemWithStringId(IDC_MEDIA_ROUTER_MANAGE_DEVICES,
+                                  IDS_MEDIA_ROUTER_MANAGE_DEVICES);
 #if defined(GOOGLE_CHROME_BUILD)
   menu_model_.AddCheckItemWithStringId(IDC_MEDIA_ROUTER_CLOUD_SERVICES_TOGGLE,
                                        IDS_MEDIA_ROUTER_CLOUD_SERVICES_TOGGLE);
@@ -99,6 +101,7 @@ void MediaRouterContextualMenu::ExecuteCommand(int command_id,
       "https://support.google.com/chromecast/topic/3447927";
   const char kCastLearnMorePageUrl[] =
       "https://support.google.com/chromecast/answer/2998338";
+  const char kManageCastDevicesUrl[] = "chrome://cast";
 
 #if defined(GOOGLE_CHROME_BUILD)
   PrefService* pref_service;
@@ -126,6 +129,9 @@ void MediaRouterContextualMenu::ExecuteCommand(int command_id,
     case IDC_MEDIA_ROUTER_LEARN_MORE:
       chrome::ShowSingletonTab(browser_, GURL(kCastLearnMorePageUrl));
       break;
+    case IDC_MEDIA_ROUTER_MANAGE_DEVICES:
+      chrome::ShowSingletonTab(browser_, GURL(kManageCastDevicesUrl));

[apacible, 2016/06/27 19:54:56]

Do we expect this URL to change in the future? If not, this could be
kChromeUICastURL.

https://cs.chromium.org/chromium/src/chrome/common/url_constants.cc?l=150

[sheretov, 2016/06/27 20:17:26]

Done.

+      break;
     case IDC_MEDIA_ROUTER_REMOVE_TOOLBAR_ACTION:
       RemoveMediaRouterComponentAction();
       break;