Audit the last usage of Geolocation and Notification permissions.

chrome/browser/content_settings/host_content_settings_map.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.
 
 // Maps hostnames to custom content settings.  Written on the UI thread and read
 // on any thread.  One instance per profile.
 
 #ifndef CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_
 
@@ skipping 181 matching lines @@
   // Returns the ProviderType associated with the given source string.
   // TODO(estade): I regret adding this. At the moment there are no legitimate
   // uses. We should stick to ProviderType rather than string so we don't have
   // to convert backwards.
   static ProviderType GetProviderTypeFromSource(const std::string& source);
 
   bool is_off_the_record() const {
     return is_off_the_record_;
   }
 
+  void UpdateLastUsage(const GURL& primary_url,

[dewittj, 2014/06/26 15:56:51]

needs comment

+                       const GURL& secondary_url,
+                       ContentSettingsType content_type);
+
  private:
   friend class base::RefCountedThreadSafe<HostContentSettingsMap>;
   friend class HostContentSettingsMapTest_NonDefaultSettings_Test;
 
   typedef std::map<ProviderType, content_settings::ProviderInterface*>
       ProviderMap;
   typedef ProviderMap::iterator ProviderIterator;
   typedef ProviderMap::const_iterator ConstProviderIterator;
 
   virtual ~HostContentSettingsMap();
@@ skipping 42 matching lines @@
 
   // Content setting providers. This is only modified at construction
   // time and by RegisterExtensionService, both of which should happen
   // before any other uses of it.
   ProviderMap content_settings_providers_;
 
   DISALLOW_COPY_AND_ASSIGN(HostContentSettingsMap);
 };
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_