Make ToolbarActionsModel ignore calls to AddComponentAction() before initialization

chrome/browser/extensions/component_migration_helper.h

Index: chrome/browser/extensions/component_migration_helper.h
diff --git a/chrome/browser/extensions/component_migration_helper.h b/chrome/browser/extensions/component_migration_helper.h
index 2e78b5ee736466286d45311fecdfeb0339a9c6cc..98d5a481fed58140fc0366b58f0e90dd2d00d707 100644
--- a/chrome/browser/extensions/component_migration_helper.h
+++ b/chrome/browser/extensions/component_migration_helper.h
@@ -77,6 +77,9 @@ class ComponentMigrationHelper : public ExtensionRegistryObserver {
 
     // Returns |true| if the toolbar model has an action for |action_id|.
     virtual bool HasComponentAction(const std::string& action_id) const = 0;
+
+    // Returns |true| if the toolbar actions have been initialized.
+    virtual bool ActionsInitialized() const = 0;
   };
 
   ComponentMigrationHelper(Profile* profile, ComponentActionDelegate* delegate);