Implement <webview>.addContentScript/removeContentScript API [2]

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 5ca40605a74a645bd69ef5e2fe8a3dada68be065..1bd747a65b3ed853b2e679cc6e5f27c55750fd32 100644
--- a/extensions/browser/extension_user_script_loader.h
+++ b/extensions/browser/extension_user_script_loader.h
@@ -30,10 +30,18 @@ class ExtensionUserScriptLoader : public UserScriptLoader,
                             bool listen_for_extension_system_loaded);
   ~ExtensionUserScriptLoader() override;
 
+  // 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);
+
  private:
   // UserScriptLoader:
-  void UpdateHostsInfo(const std::set<HostID>& changed_hosts) override;
-  LoadUserScriptsContentFunction GetLoadUserScriptsFunction() override;
+  void LoadScripts(const std::set<HostID>& changed_hosts,
+                   const std::set<int>& added_script_ids) override;
+
+  // Updates |hosts_info_| to contain info for each element of
+  //  |changed_hosts_|.
+  void UpdateHostsInfo(const std::set<HostID>& changed_hosts);
 
   // ExtensionRegistryObserver:
   void OnExtensionUnloaded(content::BrowserContext* browser_context,
@@ -44,6 +52,12 @@ class ExtensionUserScriptLoader : public UserScriptLoader,
   // to be ready.
   void OnExtensionSystemReady();
 
+  // Maps host info needed for localization to a host ID.
+  HostsInfo hosts_info_;
+
+  // Manages content verification of the loaded user scripts.
+  scoped_refptr<ContentVerifier> content_verifier_;
+
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;