Detach the dependency from host_content_settings_map to extension.

chrome/browser/content_settings/content_settings_default_provider.cc

 // 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.
 
 #include "chrome/browser/content_settings/content_settings_default_provider.h"
 
 #include <string>
 #include <vector>
 
 #include "base/auto_reset.h"
@@ skipping 259 matching lines @@
 }
 
 void DefaultProvider::ShutdownOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(prefs_);
   RemoveAllObservers();
   pref_change_registrar_.RemoveAll();
   prefs_ = NULL;
 }
 
+std::string DefaultProvider::GetProviderName() const {
+  return "default";
+}
+
+SettingSource DefaultProvider::GetSettingSource() const {
+  return SETTING_SOURCE_USER;
+}
+
 void DefaultProvider::OnPreferenceChanged(const std::string& name) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (updating_preferences_)
     return;
 
   if (name == prefs::kDefaultContentSettings) {
     ReadDefaultSettings(true);
   } else {
     NOTREACHED() << "Unexpected preference observed";
     return;
@@ skipping 50 matching lines @@
   // Migrate obsolete cookie prompt mode.
   if (ValueToContentSetting(
           default_settings_[CONTENT_SETTINGS_TYPE_COOKIES].get()) ==
               CONTENT_SETTING_ASK) {
     default_settings_[CONTENT_SETTINGS_TYPE_COOKIES].reset(
         new base::FundamentalValue(CONTENT_SETTING_BLOCK));
   }
 }
 
 }  // namespace content_settings