Ensure that GetBootTimes is always called, since it updates histograms

chrome/browser/chromeos/login/version_info_updater.h

Index: chrome/browser/chromeos/login/version_info_updater.h
===================================================================
--- chrome/browser/chromeos/login/version_info_updater.h	(revision 108130)
+++ chrome/browser/chromeos/login/version_info_updater.h	(working copy)
@@ -62,6 +62,9 @@
   // Callback from chromeos::InfoLoader giving the boot times.
   void OnBootTimes(
       BootTimesLoader::Handle handle, BootTimesLoader::BootTimes boot_times);
+  // Null callback from chromeos::InfoLoader.
+  void OnBootTimesNoop(
+      BootTimesLoader::Handle handle, BootTimesLoader::BootTimes boot_times);
 
   // Handles asynchronously loading the version.
   VersionLoader version_loader_;
@@ -93,4 +96,3 @@
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_VERSION_INFO_UPDATER_H_
-