Show the Cast toolbar icon ephemerally when Cast is in use

chrome/browser/ui/toolbar/toolbar_actions_bar.cc

Index: chrome/browser/ui/toolbar/toolbar_actions_bar.cc
diff --git a/chrome/browser/ui/toolbar/toolbar_actions_bar.cc b/chrome/browser/ui/toolbar/toolbar_actions_bar.cc
index d60b27b960cc304c4dbace88b83b171766cd7323..73b094ead90e22f44a7900e436429a6485722891 100644
--- a/chrome/browser/ui/toolbar/toolbar_actions_bar.cc
+++ b/chrome/browser/ui/toolbar/toolbar_actions_bar.cc
@@ -678,9 +678,11 @@ void ToolbarActionsBar::OnToolbarActionRemoved(const std::string& action_id) {
   // because the icon is just going to get re-added to the same location.
   // There is an exception if this is an off-the-record profile, and the
   // extension is no longer incognito-enabled.
-  if (!extensions::ExtensionSystem::Get(browser_->profile())
-           ->runtime_data()
-           ->IsBeingUpgraded(action_id) ||
+  if (ComponentToolbarActionsFactory::GetInstance()
+          ->IsComponentActionId(action_id) ||
+      !extensions::ExtensionSystem::Get(browser_->profile())
+          ->runtime_data()
+          ->IsBeingUpgraded(action_id) ||
       (browser_->profile()->IsOffTheRecord() &&
        !extensions::util::IsIncognitoEnabled(action_id, browser_->profile()))) {
     if (toolbar_actions_.size() > model_->visible_icon_count()) {