Support building BoringSSL with NSS certificates.

chrome/utility/BUILD.gn

Index: chrome/utility/BUILD.gn
diff --git a/chrome/utility/BUILD.gn b/chrome/utility/BUILD.gn
index a4ca50e18e41c4eef0629517d4b35e53fb80edb4..a5ffe91bc31b4d098471649b9db14216110de34b 100644
--- a/chrome/utility/BUILD.gn
+++ b/chrome/utility/BUILD.gn
@@ -72,21 +72,15 @@ static_library("utility") {
     }
   }
 
-  if (use_openssl) {
-    if (!is_win && !is_mac && !is_android) {
-      sources -= [ "importer/nss_decryptor.cc" ]
-    }
-  } else {  # !use_openssl
-    if (!is_win && !is_mac) {
-      sources += [
-        "importer/nss_decryptor_system_nss.cc",
-        "importer/nss_decryptor_system_nss.h",
-      ]
-      deps += [
-        "//crypto",
-        "//crypto:platform",
-      ]
-    }
+  if (use_nss_certs) {
+    sources += [
+      "importer/nss_decryptor_system_nss.cc",
+      "importer/nss_decryptor_system_nss.h",
+    ]
+    deps += [
+      "//crypto",
+      "//crypto:platform",
+    ]
   }
 
   if (!enable_print_preview) {