Update the Website Settings options page when a Content Setting is used.

chrome/browser/content_settings/host_content_settings_map.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/host_content_settings_map.h"
 
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
@@ skipping 362 matching lines @@
 }
 
 void HostContentSettingsMap::UpdateLastUsageByPattern(
     const ContentSettingsPattern& primary_pattern,
     const ContentSettingsPattern& secondary_pattern,
     ContentSettingsType content_type) {
   UsedContentSettingsProviders();
 
   GetPrefProvider()->UpdateLastUsage(
       primary_pattern, secondary_pattern, content_type);
+
+  FOR_EACH_OBSERVER(
+      content_settings::Observer,
+      observers_,
+      OnContentSettingUsed(primary_pattern, secondary_pattern, content_type));
 }
 
 base::Time HostContentSettingsMap::GetLastUsage(
     const GURL& primary_url,
     const GURL& secondary_url,
     ContentSettingsType content_type) {
   return GetLastUsageByPattern(
       ContentSettingsPattern::FromURLNoWildcard(primary_url),
       ContentSettingsPattern::FromURLNoWildcard(secondary_url),
       content_type);
@@ skipping 353 matching lines @@
   }
 
   NOTREACHED();
   return DEFAULT_PROVIDER;
 }
 
 content_settings::PrefProvider* HostContentSettingsMap::GetPrefProvider() {
   return static_cast<content_settings::PrefProvider*>(
       content_settings_providers_[PREF_PROVIDER]);
 }