Suggest upgrading to SP3 or later for invalid certificate errors.

chrome/browser/ssl/ssl_error_classification.cc

Index: chrome/browser/ssl/ssl_error_classification.cc
diff --git a/chrome/browser/ssl/ssl_error_classification.cc b/chrome/browser/ssl/ssl_error_classification.cc
index ae9283c190f73594e2622102a2336d99b318f4c2..c81c88794f06e42f1a8adbbf0451a57a347dd0f5 100644
--- a/chrome/browser/ssl/ssl_error_classification.cc
+++ b/chrome/browser/ssl/ssl_error_classification.cc
@@ -16,6 +16,10 @@ using base::Time;
 using base::TimeTicks;
 using base::TimeDelta;
 
+#if defined(OS_WIN)
+#include "base/win/windows_version.h"
+#endif
+
 namespace {
 
 // Events for UMA. Do not reorder or change!
@@ -116,6 +120,16 @@ bool SSLErrorClassification::IsUserClockInTheFuture(base::Time time_now) {
   return false;
 }
 
+bool SSLErrorClassification::IsWindowsVersionSP3OrLower() {
+#if defined(OS_WIN)
+  const base::win::OSInfo* os_info = base::win::OSInfo::GetInstance();
+  base::win::OSInfo::ServicePack service_pack = os_info->service_pack();
+  if (os_info->version() < base::win::VERSION_VISTA && service_pack.major < 3)
+    return true;
+#endif
+  return false;
+}
+
 void SSLErrorClassification::RecordUMAStatistics(bool overridable) {
   if (IsUserClockInThePast(base::Time::NowFromSystemTime()))
     RecordSSLInterstitialCause(overridable, CLOCK_PAST);