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

Website Settings options page.

Image: http://imgur.com/LzbuTsJ

BUG=372607

Review URL: https://codereview.chromium.org/445623003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287979 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/options/website_settings.css

@@ -37,6 +37,8 @@
 /* Styles for the origin list elements in the website settings page. */
 #origin-list {
   border: 1px solid #d9d9d9;
+  font-family: Noto Sans;
+  font-size: 13px;
   margin: 5px 0 0;
   min-height: 287px;
 }
@@ -45,9 +47,12 @@
   height: 30px;
 }
 
+.local-storage-usage {
+  color: #7f7f7f;
+  margin: auto 0;
+}
+
 list.origin-list .favicon-cell {
   -webkit-margin-start: 6px;
   -webkit-padding-start: 21px;
-  font-family: Noto Sans;
-  font-size: 13px;
 }

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

@@ -9,6 +9,7 @@
 #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 {
@@ -159,6 +160,11 @@ void WebsiteSettingsHandler::UpdateOrigins() {
     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);
   }