Unload old Cast extensions after initializing ToolbarActionsModel

chrome/browser/ui/toolbar/component_toolbar_actions_factory.h

Index: chrome/browser/ui/toolbar/component_toolbar_actions_factory.h
diff --git a/chrome/browser/ui/toolbar/component_toolbar_actions_factory.h b/chrome/browser/ui/toolbar/component_toolbar_actions_factory.h
index 7768b7db6eff8c9730aeab98e1df927f0264d65a..6b2d58bb69178021c6e81f5ce0cbcd1b8ea57362 100644
--- a/chrome/browser/ui/toolbar/component_toolbar_actions_factory.h
+++ b/chrome/browser/ui/toolbar/component_toolbar_actions_factory.h
@@ -13,15 +13,22 @@
 #include "chrome/browser/ui/toolbar/toolbar_actions_bar.h"
 
 class Browser;
+class ExtensionService;
 class Profile;
 class ToolbarActionViewController;
 
+namespace extensions {
+class ExtensionRegistry;
+}
+
 // The registry for all component toolbar actions. Component toolbar actions
 // are actions that live in the toolbar (like extension actions), but are
 // components of chrome, such as ChromeCast.
 class ComponentToolbarActionsFactory {
  public:
-  // Component action IDs.
+  // Extension and component action IDs.
+  static const char kCastBetaExtensionId[];
+  static const char kCastExtensionId[];
   static const char kMediaRouterActionId[];
 
   ComponentToolbarActionsFactory();
@@ -39,11 +46,21 @@ class ComponentToolbarActionsFactory {
                                  Browser* browser,
                                  ToolbarActionsBar* bar);
 
+  // Unloads extensions that were migrated to component actions and therefore
+  // are no longer needed.
+  void UnloadMigratedExtensions(ExtensionService* service,
+                                extensions::ExtensionRegistry* registry);
+
   // Sets the factory to use for testing purposes.
   // Ownership remains with the caller.
   static void SetTestingFactory(ComponentToolbarActionsFactory* factory);
 
  private:
+  // Unloads an extension if it is active.
+  void UnloadExtension(ExtensionService* service,
+                       extensions::ExtensionRegistry* registry,
+                       const std::string& extension_id);
+
   DISALLOW_COPY_AND_ASSIGN(ComponentToolbarActionsFactory);
 };