Implement declarativeContent API.

chrome/browser/extensions/api/declarative/rules_registry_service.h

 // Copyright (c) 2012 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_API_DECLARATIVE_RULES_REGISTRY_SERVICE_H__
 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_SERVICE_H__
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
 
 namespace content {
 class NotificationSource;
 class NotificationSource;
 }
 
 namespace extensions {
+class ContentRulesRegistry;
 class RulesRegistry;
 class RulesRegistryStorageDelegate;
 }
 
 namespace extensions {
 
 // This class owns all RulesRegistries implementations of an ExtensionService.
 // This class lives on the UI thread.
 class RulesRegistryService : public content::NotificationObserver  {
  public:
   explicit RulesRegistryService(Profile* profile);
   virtual ~RulesRegistryService();
 
   // Unregisters refptrs to concrete RulesRegistries at other objects that were
   // created by us so that the RulesRegistries can be released.
   void Shutdown();
 
   // Registers the default RulesRegistries used in Chromium.
   void RegisterDefaultRulesRegistries();
 
   // Registers a RulesRegistry and wraps it in an InitializingRulesRegistry.
   void RegisterRulesRegistry(const std::string& event_name,
                              scoped_refptr<RulesRegistry> rule_registry);
 
   // Returns the RulesRegistry for |event_name| or NULL if no such registry
   // has been registered.
   scoped_refptr<RulesRegistry> GetRulesRegistry(
       const std::string& event_name) const;
 
+  // Accessors for each type of rules registry.
+  ContentRulesRegistry* content_rules_registry() const {
+    return content_rules_registry_;
+  }
+
   // For testing.
   void SimulateExtensionUnloaded(const std::string& extension_id);
  private:
   // Maps event names to RuleRegistries that handle these events.
   typedef std::map<std::string, scoped_refptr<RulesRegistry> > RulesRegistryMap;
 
   // Notifies all RulesRegistries that |extension_id| was unloaded.
   // It is not guaranteed that this notification is processed synchronously.
   // If extensions live on another thread, the notification is posted.
   void OnExtensionUnloaded(const std::string& extension_id);
 
   // Implementation of content::NotificationObserver.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   RulesRegistryMap rule_registries_;
 
   // These are weak pointers to the delegates owned by the RulesRegistry's. We
   // keep track of them so we can tell them to do cleanup on shutdown.
   std::vector<RulesRegistryStorageDelegate*> delegates_;
 
+  // Weak pointer into rule_registries_ to make it easier to handle content rule
+  // conditions.
+  ContentRulesRegistry* content_rules_registry_;
+
   content::NotificationRegistrar registrar_;
 
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(RulesRegistryService);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_SERVICE_H__