Revert of Show the Cast toolbar icon ephemerally when Cast is in use

chrome/browser/extensions/component_migration_helper.cc

Index: chrome/browser/extensions/component_migration_helper.cc
diff --git a/chrome/browser/extensions/component_migration_helper.cc b/chrome/browser/extensions/component_migration_helper.cc
index 93b36a842c88819af5be0941e385fbca95612e8c..7de2caa9773e3e49033483107317284b888d23b4 100644
--- a/chrome/browser/extensions/component_migration_helper.cc
+++ b/chrome/browser/extensions/component_migration_helper.cc
@@ -9,7 +9,6 @@
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system_impl.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/toolbar/component_toolbar_actions_factory.h"
 #include "chrome/common/pref_names.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
@@ -95,11 +94,6 @@
 
   if (component_action_pref &&
       !delegate_->HasComponentAction(component_action_id)) {
-    if (component_action_id ==
-        ComponentToolbarActionsFactory::kMediaRouterActionId) {
-      pref_service_->SetBoolean(prefs::kMediaRouterAlwaysShowActionIcon,
-                                true);
-    }
     delegate_->AddComponentAction(component_action_id);
   }
 }
@@ -112,12 +106,6 @@
 
   enabled_actions_.erase(component_action_id);
   RemoveComponentActionPref(component_action_id);
-
-  if (component_action_id ==
-      ComponentToolbarActionsFactory::kMediaRouterActionId) {
-    pref_service_->SetBoolean(prefs::kMediaRouterAlwaysShowActionIcon,
-                              false);
-  }
 
   if (FeatureSwitch::extension_action_redesign()->IsEnabled() &&
       delegate_->HasComponentAction(component_action_id))
@@ -145,14 +133,6 @@
   if (base::ContainsKey(enabled_actions_, component_action_id)) {
     UnloadExtension(extension_id);
     SetComponentActionPref(component_action_id, true);
-
-    // We treat installation of the cast extension as a signal to permanently
-    // show the icon in the toolbar.
-    if (component_action_id ==
-        ComponentToolbarActionsFactory::kMediaRouterActionId) {
-      pref_service_->SetBoolean(prefs::kMediaRouterAlwaysShowActionIcon,
-                                true);
-    }
 
     if (!delegate_->HasComponentAction(component_action_id))
       delegate_->AddComponentAction(component_action_id);