Add crypto/wincrypt_shim.h wrapper header to resolve BoringSSL conflicts.

net/cert/cert_database_win.cc

Index: net/cert/cert_database_win.cc
diff --git a/net/cert/cert_database_win.cc b/net/cert/cert_database_win.cc
index 9bf378cc35084519b7fa2d89cb67c2f1c93f3876..3dc5ee2ac3f2909eb0486bc9d279c475a2bf3d65 100644
--- a/net/cert/cert_database_win.cc
+++ b/net/cert/cert_database_win.cc
@@ -5,13 +5,14 @@
 #include "net/cert/cert_database.h"
 
 #include <windows.h>
-#include <wincrypt.h>
-#pragma comment(lib, "crypt32.lib")
 
 #include "base/observer_list_threadsafe.h"
+#include "crypto/wincrypt.h"
 #include "net/base/net_errors.h"
 #include "net/cert/x509_certificate.h"
 
+#pragma comment(lib, "crypt32.lib")
+
 namespace net {
 
 CertDatabase::CertDatabase()