[Extenisons UI] Remove extension_action_redesign logic from the toolbar

chrome/browser/ui/toolbar/toolbar_actions_model.h

Index: chrome/browser/ui/toolbar/toolbar_actions_model.h
diff --git a/chrome/browser/ui/toolbar/toolbar_actions_model.h b/chrome/browser/ui/toolbar/toolbar_actions_model.h
index 8f01c23bf5bc5cdf968f3cd9a52dd0f40f06a0e9..662844d9c0287f7aefd0b10f3a59570e976d6330 100644
--- a/chrome/browser/ui/toolbar/toolbar_actions_model.h
+++ b/chrome/browser/ui/toolbar/toolbar_actions_model.h
@@ -225,8 +225,6 @@ class ToolbarActionsModel : public extensions::ExtensionActionAPI::Observer,
       ExtensionAction* extension_action,
       content::WebContents* web_contents,
       content::BrowserContext* browser_context) override;
-  void OnExtensionActionVisibilityChanged(const std::string& extension_id,
-                                          bool is_now_visible) override;
 
   // To be called after the extension service is ready; gets loaded extensions
   // from the ExtensionRegistry, their saved order from the pref service, and
@@ -299,9 +297,6 @@ class ToolbarActionsModel : public extensions::ExtensionActionAPI::Observer,
   // True if we've handled the initial EXTENSIONS_READY notification.
   bool actions_initialized_;
 
-  // If true, we include all actions in the toolbar model.
-  bool use_redesign_;
-
   // Ordered list of browser actions.
   std::vector<ToolbarItem> toolbar_items_;