Surface the audited last usage time in a user readable string.

chrome/browser/ui/webui/options/website_settings_handler.cc

 // Copyright 2014 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/ui/webui/options/website_settings_handler.h"
 
 #include "chrome/browser/content_settings/content_settings_utils.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/web_ui.h"
 #include "grit/generated_resources.h"
+#include "ui/base/l10n/time_format.h"
 #include "ui/base/text/bytes_formatting.h"
 
 namespace {
 
 const char kPreferencesSource[] = "preference";
 const char kStorage[] = "storage";
 const ContentSettingsType kValidTypes[] = {CONTENT_SETTINGS_TYPE_GEOLOCATION,
                                            CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
                                            CONTENT_SETTINGS_TYPE_MEDIASTREAM};
 const size_t kValidTypesLength = arraysize(kValidTypes);
@@ skipping 130 matching lines @@
 
     if (origin.find(last_filter_) == base::string16::npos)
       continue;
 
     base::Time last_usage = settings->GetLastUsageByPattern(
         it->primary_pattern, it->secondary_pattern, last_setting);
 
     base::DictionaryValue* origin_entry = new base::DictionaryValue();
     origin_entry->SetDoubleWithoutPathExpansion("usage",
                                                 last_usage.ToDoubleT());
+    origin_entry->SetStringWithoutPathExpansion(
+        "usageString",
+        ui::TimeFormat::Simple(ui::TimeFormat::FORMAT_ELAPSED,
+                               ui::TimeFormat::LENGTH_SHORT,
+                               base::Time::Now() - last_usage));
     origins.SetWithoutPathExpansion(origin, origin_entry);
   }
 
   web_ui()->CallJavascriptFunction("WebsiteSettingsManager.populateOrigins",
                                    origins);
 }
 
 void WebsiteSettingsHandler::UpdateLocalStorage() {
   base::DictionaryValue local_storage_map;
   for (LocalStorageList::const_iterator it = local_storage_list_.begin();
        it != local_storage_list_.end();
        it++) {
     std::string origin = it->origin_url.spec();
 
     if (origin.find(last_filter_) == base::string16::npos)
       continue;
 
     base::DictionaryValue* origin_entry = new base::DictionaryValue();
     origin_entry->SetWithoutPathExpansion(
         "usage", new base::FundamentalValue(static_cast<double>(it->size)));
     origin_entry->SetWithoutPathExpansion(
         "usageString", new base::StringValue(ui::FormatBytes(it->size)));
     local_storage_map.SetWithoutPathExpansion(origin, origin_entry);
   }
   web_ui()->CallJavascriptFunction("WebsiteSettingsManager.populateOrigins",
                                    local_storage_map);
 }
 
 }  // namespace options