Remove Windows Vista/XP specific code from net/cert and net/ssl.

net/cert/test_root_certs_win.cc

Index: net/cert/test_root_certs_win.cc
diff --git a/net/cert/test_root_certs_win.cc b/net/cert/test_root_certs_win.cc
index 67bf1b09f75ac0f5b13f23803f316adcf6e26c09..8f17746404603af9f5da13d3461acdd243e2f00f 100644
--- a/net/cert/test_root_certs_win.cc
+++ b/net/cert/test_root_certs_win.cc
@@ -9,7 +9,6 @@
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/win/win_util.h"
-#include "base/win/windows_version.h"
 #include "net/cert/x509_certificate.h"
 
 namespace net {
@@ -173,12 +172,6 @@ HCERTCHAINENGINE TestRootCerts::GetChainEngine() const {
   if (IsEmpty())
     return NULL;  // Default chain engine will suffice.
 
-  // Windows versions before 7 don't accept the struct size for later versions.
-  // We report the size of the old struct since we don't need the new members.
-  static const DWORD kSizeofCertChainEngineConfig =
-      SIZEOF_STRUCT_WITH_SPECIFIED_LAST_MEMBER(
-          CERT_CHAIN_ENGINE_CONFIG, CycleDetectionModulus);
-
   // Each HCERTCHAINENGINE caches both the configured system stores and
   // information about each chain that has been built. In order to ensure
   // that changes to |temporary_roots_| are properly propagated and that the
@@ -186,9 +179,7 @@ HCERTCHAINENGINE TestRootCerts::GetChainEngine() const {
   // return a new chain engine for every call. Each chain engine creation
   // should re-open the root store, ensuring the most recent changes are
   // visible.
-  CERT_CHAIN_ENGINE_CONFIG engine_config = {
-    kSizeofCertChainEngineConfig
-  };
+  CERT_CHAIN_ENGINE_CONFIG engine_config = {sizeof(CERT_CHAIN_ENGINE_CONFIG)};

[Ryan Sleevi, 2016/05/17 20:26:01]

CERT_CHAIN_ENGINE_CONFIG engine_config = {0};
engine_config.dwSize = sizeof(engine_config);

Is the more idiomatic form.

[martijnc, 2016/05/19 21:27:33]

I kept the old code but included the 2 fields that were added in Windows 7.
Using sizeof() doesn't seem to work (because of the Windows 8+ field?).

   engine_config.dwFlags =
       CERT_CHAIN_ENABLE_CACHE_AUTO_UPDATE |
       CERT_CHAIN_ENABLE_SHARE_STORE;