[Garbled Text][Infobar] Adding infobar to suggest turning on encoding detection.

chrome/browser/garbled_text_service.h

+// Copyright (c) 2011 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_GARBLED_TEXT_SERVICE_H_
+#define CHROME_BROWSER_GARBLED_TEXT_SERVICE_H_
+#pragma once
+
+#include "base/callback_forward.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/singleton.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/non_thread_safe.h"
+#include "chrome/browser/garbled_text_url_tracker.h"
+#include "chrome/browser/prefs/pref_change_registrar.h"
+#include "chrome/browser/profiles/profile_keyed_service.h"
+#include "chrome/browser/profiles/profile_keyed_service_factory.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+class Profile;
+namespace content {
+class NotificationDetails;
+class NotificationSource;
+}
+
+class GarbledTextService;
+
+// Factory class of GarbledTextURLTracker.  This class is instantiated on UI
+// thread and create GarbledTextURLTracker on IO thread.
+class GarbledTextServiceParams {
+ public:
+  explicit GarbledTextServiceParams(PrefService* user_prefs,
+                                    GarbledTextService* service);
+  ~GarbledTextServiceParams();
+  scoped_ptr<GarbledTextURLTracker> CreateTracker(
+      const BooleanPrefMember& enabled);
+
+ private:
+  base::WeakPtr<GarbledTextService> service_;
+  GarbledTextURLTracker::Blacklist blacklist_;
+
+  DISALLOW_COPY_AND_ASSIGN(GarbledTextServiceParams);
+};
+
+// Factory class of GarbledTextService.
+class GarbledTextServiceFactory : public ProfileKeyedServiceFactory {
+ public:
+  static GarbledTextService* GetForProfile(Profile* profile);
+  static GarbledTextServiceFactory* GetInstance();
+
+  virtual void RegisterUserPrefs(PrefService* user_prefs) OVERRIDE;
+  virtual bool ServiceHasOwnInstanceInIncognito() OVERRIDE;
+  virtual bool ServiceIsNULLWhileTesting() OVERRIDE;
+
+ private:
+  friend struct DefaultSingletonTraits<GarbledTextServiceFactory>;
+
+  GarbledTextServiceFactory();
+  virtual ~GarbledTextServiceFactory();
+
+  virtual ProfileKeyedService* BuildServiceInstanceFor(
+      Profile* profile) const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(GarbledTextServiceFactory);
+};
+
+// Proxy class for GarbledTextURLTracker from UI thread.  This class is
+// instantiated per Profile instance and held as ProfileKeyedService.
+class GarbledTextService
+    : public base::NonThreadSafe,
+      public base::SupportsWeakPtr<GarbledTextService>,
+      public ProfileKeyedService {
+ public:
+  typedef GarbledTextURLTracker::Blacklist Blacklist;
+  typedef GarbledTextURLTracker::GarbledURLs GarbledURLs;
+
+  static const char kPrefGarbledTextBlacklist[];
+
+  explicit GarbledTextService(Profile* profile);
+  virtual ~GarbledTextService();
+
+  // Appends normalized |garbled_urls| to the blacklist asynchronously.
+  void UpdateBlacklist(const GarbledURLs& garbled_urls,
+                       const base::Closure& callback);
+
+  void SetTracker(base::WeakPtr<GarbledTextURLTracker> tracker);
+
+ private:
+  friend class GarbledTextHelperTest;
+  friend class GarbledTextServiceTest;
+
+  void UpdatePref(const Blacklist* blacklist_delta,
+                  const base::Closure& callback);
+
+  Profile* profile_;
+  base::WeakPtr<GarbledTextURLTracker> tracker_;
+
+  DISALLOW_COPY_AND_ASSIGN(GarbledTextService);
+};
+
+#endif  // CHROME_BROWSER_GARBLED_TEXT_SERVICE_H_