Adding macro to enable changing SSL library (Part 1)

tools/grit/grit_rule.gni

 # 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.
 
 # Instantiate grit. This will produce a script target to run grit, and a
 # static library that compiles the .cc files.
 #
 # Parameters
 #
 #   source (required)
@@ skipping 141 matching lines @@
   ]
 }
 
 if (use_nss_certs) {
   grit_defines += [
     "-D",
     "use_nss_certs",
   ]
 }
 
+if (use_nss_verifier) {
+  grit_defines += [
+    "-D",
+    "use_nss_verifier",
+  ]
+}
+
 if (use_ozone) {
   grit_defines += [
     "-D",
     "use_ozone",
   ]
 }
 
 if (enable_image_loader_extension) {
   grit_defines += [
     "-D",
@@ skipping 301 matching lines @@
     if (defined(invoker.configs)) {
       configs += invoker.configs
     }
 
     if (defined(invoker.visibility)) {
       visibility = invoker.visibility
     }
     output_name = grit_output_name
   }
 }