Mojo JS bindings: introduce new targets "foo_js"/"foo_js_data_deps" for mojom("foo").

ios/web/test/BUILD.gn

 # Copyright 2016 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.
 
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 
 mojom("mojo_bindings") {
   sources = [
@@ skipping 17 matching lines @@
   output = "$target_gen_dir/resources.pak"
   copy_data_to_bundle = true
 }
 
 grit("resources") {
   source = "test_resources.grd"
   inputs = [
     "${root_gen_dir}/ios/web/test/mojo_test.mojom.js",
   ]
   deps = [
-    ":mojo_bindings",
+    ":mojo_bindings_js",
   ]
   outputs = [
     "grit/test_resources.h",
     "test_resources.pak",
   ]
   grit_flags = [
     "-E",
     "root_gen_dir=" + rebase_path(root_gen_dir, root_build_dir),
   ]
 }
@@ skipping 30 matching lines @@
   ]
 }
 
 source_set("test_constants") {
   testonly = true
   sources = [
     "test_url_constants.cc",
     "test_url_constants.h",
   ]
 }