Show the Cast toolbar icon ephemerally when Cast is in use

chrome/browser/ui/toolbar/media_router_contextual_menu.h

Index: chrome/browser/ui/toolbar/media_router_contextual_menu.h
diff --git a/chrome/browser/ui/toolbar/media_router_contextual_menu.h b/chrome/browser/ui/toolbar/media_router_contextual_menu.h
index 234f7852597e4be46c1ef75b09ec94a17e130c61..be20e9a6e1847d11a869ac88155bc22eff01ca28 100644
--- a/chrome/browser/ui/toolbar/media_router_contextual_menu.h
+++ b/chrome/browser/ui/toolbar/media_router_contextual_menu.h
@@ -10,6 +10,7 @@
 #include "ui/base/models/simple_menu_model.h"
 
 class Browser;
+class MediaRouterAction;
 
 // The class for the contextual menu for the Media Router action.
 class MediaRouterContextualMenu : public ui::SimpleMenuModel::Delegate {
@@ -17,6 +18,8 @@ class MediaRouterContextualMenu : public ui::SimpleMenuModel::Delegate {
   explicit MediaRouterContextualMenu(Browser* browser);
   ~MediaRouterContextualMenu() override;
 
+  void SetMediaRouterAction(MediaRouterAction* action);

[Devlin, 2016/08/02 20:18:51]

Is there a reason to not pass this in in the ctor?

[takumif, 2016/08/03 22:03:51]

No. Putting it in the constructor.

+
   ui::MenuModel* menu_model() { return &menu_model_; }
 
  private:
@@ -27,10 +30,10 @@ class MediaRouterContextualMenu : public ui::SimpleMenuModel::Delegate {
   void ExecuteCommand(int command_id, int event_flags) override;
 
   void ReportIssue();
-  void RemoveMediaRouterComponentAction();
 
   Browser* browser_;
   ui::SimpleMenuModel menu_model_;
+  MediaRouterAction* action_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterContextualMenu);
 };