Remove extension-to-component migration mechanism

chrome/browser/ui/toolbar/media_router_action_controller.h

 // Copyright 2016 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.
 
 #ifndef CHROME_BROWSER_UI_TOOLBAR_MEDIA_ROUTER_ACTION_CONTROLLER_H_
 #define CHROME_BROWSER_UI_TOOLBAR_MEDIA_ROUTER_ACTION_CONTROLLER_H_
 
 #include <vector>
 
-#include "chrome/browser/extensions/component_migration_helper.h"
 #include "chrome/browser/media/router/issues_observer.h"
 #include "chrome/browser/media/router/media_routes_observer.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/toolbar/component_action_delegate.h"
 #include "components/prefs/pref_change_registrar.h"
 
-using extensions::ComponentMigrationHelper;
-
 // Controller for MediaRouterAction that determines when to show and hide the
 // action icon on the toolbar. There should be one instance of this class per
 // profile, and it should only be used on the UI thread.
 class MediaRouterActionController : public media_router::IssuesObserver,
                                     public media_router::MediaRoutesObserver {
  public:
   explicit MediaRouterActionController(Profile* profile);
   // Constructor for injecting dependencies in tests.
   MediaRouterActionController(
       Profile* profile,
       media_router::MediaRouter* router,
-      ComponentMigrationHelper::ComponentActionDelegate*
-          component_action_delegate,
-      ComponentMigrationHelper* component_migration_helper);
+      ComponentActionDelegate* component_action_delegate);

[imcheng, 2017/02/08 22:59:29]

Can this be forward declared?

[takumif, 2017/02/09 00:05:56]

Done.

   ~MediaRouterActionController() override;
 
   // Whether the media router action is shown by an administrator policy.
   static bool IsActionShownByPolicy(Profile* profile);
 
+  // Gets and sets the preference for whether the media router action should be
+  // pinned to the toolbar/overflow menu.
+  static bool GetAlwaysShowActionPref(Profile* profile);
+  static void SetAlwaysShowActionPref(Profile* profile, bool always_show);
+
   // media_router::IssuesObserver:
   void OnIssue(const media_router::Issue& issue) override;
   void OnIssuesCleared() override;
 
   // media_router::MediaRoutesObserver:
   void OnRoutesUpdated(const std::vector<media_router::MediaRoute>& routes,
                        const std::vector<media_router::MediaRoute::Id>&
                            joinable_route_ids) override;
 
   // Called when a Media Router dialog is shown or hidden, and updates the
@@ skipping 16 matching lines @@
   // Returns |true| if the Media Router action should be present on the toolbar
   // or the overflow menu.
   bool ShouldEnableAction() const;
 
   // The profile |this| is associated with. There should be one instance of this
   // class per profile.
   Profile* const profile_;
 
   // The delegate that is responsible for showing and hiding the icon on the
   // toolbar. It outlives |this|.
-  ComponentMigrationHelper::ComponentActionDelegate* const
-      component_action_delegate_;
-
-  // Responsible for changing the pref to always show or hide component actions.
-  // It is owned by ToolbarActionsModel and outlives |this|.
-  ComponentMigrationHelper* const component_migration_helper_;
+  ComponentActionDelegate* const component_action_delegate_;
 
   bool has_issue_ = false;
   bool has_local_display_route_ = false;
 
   // Whether the media router action is shown by an administrator policy.
   bool shown_by_policy_;
 
   // The number of dialogs that are currently open.
   size_t dialog_count_ = 0;
 
   PrefChangeRegistrar pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterActionController);
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_MEDIA_ROUTER_ACTION_CONTROLLER_H_