Check X509Certificate::CreateFromHandle result.

net/cert/cert_verify_proc_builtin.cc

Index: net/cert/cert_verify_proc_builtin.cc
diff --git a/net/cert/cert_verify_proc_builtin.cc b/net/cert/cert_verify_proc_builtin.cc
index 0ac039942e1c9c61f002da8e01a00a75ed3d7fc1..67e91e5f656753fbeff6d92009f3e36930a4a7b6 100644
--- a/net/cert/cert_verify_proc_builtin.cc
+++ b/net/cert/cert_verify_proc_builtin.cc
@@ -309,6 +309,8 @@ scoped_refptr<X509Certificate> CreateVerifiedCertChain(
 
   scoped_refptr<X509Certificate> result = X509Certificate::CreateFromHandle(
       target_cert->os_cert_handle(), intermediates);
+  // |target_cert| was already successfully parsed, so this should never fail.
+  DCHECK(result);
 
   for (const X509Certificate::OSCertHandle handle : intermediates)
     X509Certificate::FreeOSCertHandle(handle);