Layout tests expect the time to be relative to the unix epoch.

webkit/support/webkit_support.cc

Index: webkit/support/webkit_support.cc
diff --git a/webkit/support/webkit_support.cc b/webkit/support/webkit_support.cc
index ebde513c0bc0ff294b4677fba0e0232032bfd7d5..4f16414a0d9ee466edf267d120edd805114810b4 100644
--- a/webkit/support/webkit_support.cc
+++ b/webkit/support/webkit_support.cc
@@ -740,8 +740,9 @@ ScopedTempDirectory* CreateScopedTempDirectory() {
 }
 
 int64 GetCurrentTimeInMillisecond() {
-  return base::TimeTicks::Now().ToInternalValue()
-      / base::Time::kMicrosecondsPerMillisecond;
+  return base::TimeDelta(base::Time::Now() -
+                         base::Time::UnixEpoch()).ToInternalValue() /
+         base::Time::kMicrosecondsPerMillisecond;
 }
 
 std::string EscapePath(const std::string& path) {