Update comment that incorrectly specified a timestamp's units in milliseconds rather than seconds.

BUG=none


Review URL: https://chromiumcodereview.appspot.com/11558038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@173127 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/metrics/metrics_log.cc b/chrome/browser/metrics/metrics_log.cc
index 5f52197..8a79997 100644
--- a/chrome/browser/metrics/metrics_log.cc
+++ b/chrome/browser/metrics/metrics_log.cc
@@ -69,7 +69,7 @@
 namespace {
 
 // Returns the date at which the current metrics client ID was created as
-// a string containing milliseconds since the epoch, or "0" if none was found.
+// a string containing seconds since the epoch, or "0" if none was found.
 std::string GetMetricsEnabledDate(PrefService* pref) {
   if (!pref) {
     NOTREACHED();