Make UserScript non-copyable.

extensions/browser/extension_user_script_loader.h

Index: extensions/browser/extension_user_script_loader.h
diff --git a/extensions/browser/extension_user_script_loader.h b/extensions/browser/extension_user_script_loader.h
index 05c9d18403236bd010fd7d2289a8ded32d020c82..aed1f08f4ad4e072a4b059e46324c4ffe456199e 100644
--- a/extensions/browser/extension_user_script_loader.h
+++ b/extensions/browser/extension_user_script_loader.h
@@ -36,11 +36,11 @@ class ExtensionUserScriptLoader : public UserScriptLoader,
 
   // A wrapper around the method to load user scripts, which is normally run on
   // the file thread. Exposed only for tests.
-  void LoadScriptsForTest(UserScriptList* user_scripts);
+  void LoadScriptsForTest(BrowserUserScriptList* user_scripts);
 
  private:
   // UserScriptLoader:
-  void LoadScripts(std::unique_ptr<UserScriptList> user_scripts,
+  void LoadScripts(std::unique_ptr<BrowserUserScriptList> user_scripts,
                    const std::set<HostID>& changed_hosts,
                    const std::set<int>& added_script_ids,
                    LoadScriptsCallback callback) override;