[Extensions] Enable the scripts-require-action feature based on all-urls pref

chrome/browser/extensions/active_script_controller.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_ACTIVE_SCRIPT_CONTROLLER_H_
 #define CHROME_BROWSER_EXTENSIONS_ACTIVE_SCRIPT_CONTROLLER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 112 matching lines @@
       const content::FrameNavigateParams& params) override;
 
   // ExtensionRegistryObserver:
   void OnExtensionUnloaded(content::BrowserContext* browser_context,
                            const Extension* extension,
                            UnloadedExtensionInfo::Reason reason) override;
 
   // The associated browser context.
   content::BrowserContext* browser_context_;
 
-  // Whether or not the ActiveScriptController is enabled (corresponding to the
-  // kActiveScriptEnforcement switch). If it is not, it acts as an empty shell,
-  // always allowing scripts to run and never displaying actions.
-  bool enabled_;
+  // Whether or not the feature was used for any extensions. This may not be the
+  // case if the user never enabled the scripts-require-action flag.
+  bool was_used_on_page_;
 
   // The map of extension_id:pending_request of all pending requests.
   PendingRequestMap pending_requests_;
 
   // The extensions which have been granted permission to run on the given page.
   // TODO(rdevlin.cronin): Right now, this just keeps track of extensions that
   // have been permitted to run on the page via this interface. Instead, it
   // should incorporate more fully with ActiveTab.
   std::set<std::string> permitted_extensions_;
 
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ActiveScriptController);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_ACTIVE_SCRIPT_CONTROLLER_H_