Mojo JS bindings: change module loading solution.

BUILD.gn

 # Copyright (c) 2013 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 878 matching lines @@
     ]
   }
 
   # This target contains only a small subset of the layout tests,
   # and is useful for testing with the regular isolate mechanism.
   # To run the full layout test suite you need to use
   # :webkit_layout_tests_exparchive, above, instead.
   group("webkit_layout_tests") {
     testonly = true
     data_deps = [
+      ":layout_test_data_mojo_bindings",
       "//content/shell:content_shell",
       "//mojo/public/interfaces/bindings/tests:test_interfaces",
       "//third_party/WebKit/public:blink_devtools_frontend_resources_files",
       "//third_party/mesa:osmesa",
       "//tools/imagediff",
     ]
 
     if (is_android) {
       data_deps += [
         "//breakpad:breakpad_unittests",
@@ skipping 36 matching lines @@
       data += [ "//third_party/apache-win32/" ]
     }
 
     if (is_android) {
       data += [
         "//third_party/catapult/",
         "//build/android/",
       ]
     }
   }
+
+  copy("layout_test_data_mojo_bindings") {
+    testonly = true
+
+    sources = [
+      "$root_gen_dir/mojo/public/js/mojo_bindings.js",
+    ]
+
+    outputs = [
+      "$root_gen_dir/layout_test_data/mojo/public/js/mojo_bindings.js",
+    ]
+
+    deps = [
+      "//mojo/public/js:new_bindings",
+    ]
+  }
 }
 
 # Add a dummy target for compatibility w/ GYP
 group("chromium_swarm_tests") {
 }
 
 group("chromium_builder_perf") {
   testonly = true
 
   if (!is_ios && !is_android && !is_chromecast) {
@@ skipping 110 matching lines @@
   assert(target_name != "")  # Mark as used.
   sources = invoker.actual_sources
   assert(
       sources == invoker.actual_sources,
       "Do not use a platform name in your output directory (found \"$root_build_dir\"). http://crbug.com/548283")
 }
 
 assert_valid_out_dir("_unused") {
   actual_sources = [ "$root_build_dir/foo" ]
 }