Implement main blink target in GN.

Source/bindings/scripts/scripts.gni

Index: Source/bindings/scripts/scripts.gni
diff --git a/Source/bindings/scripts/scripts.gni b/Source/bindings/scripts/scripts.gni
index 4eb0947ef88d95400c739651a006ae8dca22ddd8..f606a56439a335f0a6234a1c7d5625e6cb5ff7a5 100644
--- a/Source/bindings/scripts/scripts.gni
+++ b/Source/bindings/scripts/scripts.gni
@@ -35,6 +35,9 @@ idl_compiler_files = get_path_info(_gypi.idl_compiler_files, "abspath")
 template("compute_interfaces_info_individual") {
   action(target_name) {
     script = "$bindings_scripts_dir/compute_interfaces_info_individual.py"
+    if (defined(invoker.visibility)) {

[jamesr, 2014/06/19 18:01:14]

should this just happen for all templates?

[brettw, 2014/06/19 18:22:54]

Currently, templates do nothing magic with any parameters, which is sort of nice
and easy to explain. It does seem like one could make a good argument that
visibility should be implicitly inherited, although that has to be balanced
against my desire to make the behavior as simple-to-explain as possible. I'll
keep that in the back of my head.

+      visibility = invoker.visibility
+    }
 
     # Save static list to temp file to avoid blowing out command-line length
     # limit.