Component updater must fallback on using HTTP on Windows XPSP2 and below

chrome/browser/ssl/ssl_error_classification.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SSL_SSL_ERROR_CLASSIFICATION_H_
 #define CHROME_BROWSER_SSL_SSL_ERROR_CLASSIFICATION_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 22 matching lines @@
                          const net::X509Certificate& cert);
   virtual ~SSLErrorClassification();
 
   // Returns true if the system time is in the past.
   static bool IsUserClockInThePast(const base::Time& time_now);
 
   // Returns true if the system time is too far in the future or the user is
   // using a version of Chrome which is more than 1 year old.
   static bool IsUserClockInTheFuture(const base::Time& time_now);
 
-  static bool IsWindowsVersionSP3OrLower();
+  // Returns true if the OS platform is likely to have SHA-256 support.
+  static bool MaybeOSHasSHA256Support();
 
   // A function which calculates the severity score when the ssl error is
   // |CERT_DATE_INVALID|. The calculated score is between 0.0 and 1.0, higher
   // being more severe, indicating how severe the certificate's
   // date invalid error is.
   void InvalidDateSeverityScore();
 
   // A function which calculates the severity score when the ssl error is
   // |CERT_COMMON_NAME_INVALID|. The calculated score is between 0.0 and 1.0,
   // higher being more severe, indicating how severe the certificate's common
@@ skipping 88 matching lines @@
   bool captive_portal_probe_completed_;
   // Did the captive portal probe receive an error or get a non-HTTP response?
   bool captive_portal_no_response_;
   // Was a captive portal detected?
   bool captive_portal_detected_;
 
   content::NotificationRegistrar registrar_;
 };
 
 #endif  // CHROME_BROWSER_SSL_SSL_ERROR_CLASSIFICATION_H_