[MD History] Vulcanize as part of GN build.

chrome/browser/resources/vulcanize.gni

Index: chrome/browser/resources/vulcanize.gni
diff --git a/chrome/browser/resources/vulcanize.gni b/chrome/browser/resources/vulcanize.gni
index d782bc3195b1ccc23f3b50dbb012e9f7d2fd83d9..825240bf9e74e99e34596306ceccf1934f39233d 100644
--- a/chrome/browser/resources/vulcanize.gni
+++ b/chrome/browser/resources/vulcanize.gni
@@ -47,12 +47,26 @@ template("vulcanize") {
       invoker.input_type,
       "--input",
       invoker.input,
-      "--insert_in_head",
-      invoker.insert_in_head,
       "--out_folder",
       rebase_path(target_gen_dir, root_build_dir),
       "--depfile",
       rebase_path(depfile, root_build_dir),
     ]
+
+    if (defined(invoker.insert_in_head)) {
+      args += [
+        "--insert_in_head",
+        invoker.insert_in_head,
+      ]
+    }
+
+    if (defined(invoker.excludes)) {
+      foreach(_exclude, invoker.excludes) {
+        args += [
+          "--exclude",

[dpapad, 2017/02/08 23:04:18]

Can we not just pass all the excludes with a single --exclude flag? It seems
simpler and I think python's argparse can handle that for us, by passing
nargs='*' to add_argument.

[calamity, 2017/02/09 03:07:35]

Done.

+          "$_exclude",
+        ]
+      }
+    }
   }
 }