[Chromecast] Generate resource pak for bindings_resources

This change will allow loading IDR_PORT_CONNECTOR_JS from a resource pak
instead of opening and reading the JS file directly.

Bug: b/160811610
Test: CQ
Change-Id: I02cbfbc41cc983043658bbe57ac15033f0d457e2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2290530Reviewed-by: Luke Halliwell (slow) <halliwell@chromium.org>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Commit-Queue: Marzena Dell'Aquila <mdellaquila@google.com>
Cr-Commit-Position: refs/heads/master@{#787945}

chromecast/bindings/BUILD.gn

@@ -9,7 +9,11 @@ if (is_fuchsia) {
 }
 
 source_set("named_message_port_connector_resources") {
-  data = [ "resources/named_message_port_connector.js" ]
+  data = [
+    "resources/named_message_port_connector.js",
+    "${target_gen_dir}/bindings_resources.pak",
+  ]
+  deps = [ ":bindings_resources" ]
 }
 
 grit("bindings_resources") {