Implemented a "Last Updated" field for the about page of Chrome OS.

chrome/browser/ui/webui/help/help_handler.cc

Index: chrome/browser/ui/webui/help/help_handler.cc
diff --git a/chrome/browser/ui/webui/help/help_handler.cc b/chrome/browser/ui/webui/help/help_handler.cc
index 6f3a246be2f659665f21efb848e254bb3cae6b65..77214896ddbf78af54798ff32380d21d69c589ff 100644
--- a/chrome/browser/ui/webui/help/help_handler.cc
+++ b/chrome/browser/ui/webui/help/help_handler.cc
@@ -34,6 +34,8 @@
 #include "webkit/glue/webkit_glue.h"
 
 #if defined(OS_CHROMEOS)
+#include "base/i18n/time_formatting.h"
+#include "base/sys_info.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/cros_settings.h"
 #include "chrome/browser/profiles/profile.h"
@@ -90,6 +92,20 @@ bool CanChangeReleaseChannel() {
   return false;
 }
 
+// Retrieves the time of the last Chrome OS update and converts it to a human-
+// readable string. Note that this method uses an i18n-friendly library, so
+// the returned string will already be properly translated.
+string16 CreateLastUpdatedString() {
+  base::Time time;
+
+  if (!base::SysInfo::GetTimeLastUpdated(&time))

[Evan Stade, 2012/04/14 00:37:46]

curlies

[Kyle Horimoto, 2012/04/16 18:32:54]

Done.

+    // If the time of the last update cannot be retrieved, punt and just set
+    // the last update time to be the current time.
+    time = base::Time::Now();
+
+  return base::TimeFormatFriendlyDate(time);
+}
+
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace
@@ -136,6 +152,7 @@ void HelpHandler::GetLocalizedValues(DictionaryValue* localized_strings) {
     { "webkit", IDS_WEBKIT },
     { "userAgent", IDS_ABOUT_VERSION_USER_AGENT },
     { "commandLine", IDS_ABOUT_VERSION_COMMAND_LINE },
+    { "lastUpdated", IDS_ABOUT_VERSION_LAST_UPDATED },
 #endif
 #if defined(OS_MACOSX)
     { "promote", IDS_ABOUT_CHROME_PROMOTE_UPDATER },
@@ -164,6 +181,8 @@ void HelpHandler::GetLocalizedValues(DictionaryValue* localized_strings) {
       IDS_ABOUT_CROS_VERSION_LICENSE,
       ASCIIToUTF16(chrome::kChromeUIOSCreditsURL));
   localized_strings->SetString("productOsLicense", os_license);
+
+  localized_strings->SetString("lastUpdatedDate", CreateLastUpdatedString());

[Evan Stade, 2012/04/14 00:37:46]

you can't read a file on the UI thread. You must proxy this call to the file
thread.

[Kyle Horimoto, 2012/04/16 18:32:54]

Done.

 #endif
 
   string16 tos = l10n_util::GetStringFUTF16(