Fix QUnitBrowserTestRunner.Remoting_Webapp_Js_Unittest for GN browser tests.

remoting/webapp/BUILD.gn

 # Copyright 2014 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.
 
 # Keep in sync with targets in remoting/remoting_client.gypi.
 
 import("//build/config/features.gni")
 import("//remoting/webapp/build_template.gni")
 import("//remoting/webapp/files.gni")
 
@@ skipping 55 matching lines @@
   outputs = [
     "$root_out_dir/remoting/browser_test_resources/{{source_file_part}}",
   ]
 }
 
 remoting_unit_test_out_dir = "$root_out_dir/remoting/unittests"
 
 group("unit_tests") {
   data_deps = [
     ":blanketjs",
+    ":build_unittest",
     ":js_files",
     ":qunit",
     ":sinonjs",
   ]
 }
 
 copy("js_files") {
   # This list corresponds to webapp_js_files in remoting_webapp_unittests
   # target in GYP.
-  sources = remoting_webapp_unittest_html_all_js_files +
-            remoting_webapp_wcs_sandbox_html_js_files +
-            remoting_webapp_background_html_js_files +
-            remoting_webapp_unittests_all_files
+  sources = webapp_js_files + remoting_webapp_unittests_all_files
   outputs = [
     "$remoting_unit_test_out_dir/{{source_file_part}}",
   ]
 }
 
 copy("blanketjs") {
   sources = [
     "//third_party/blanketjs/src/blanket.js",
     "//third_party/blanketjs/src/qunit_adapter.js",
   ]
@@ skipping 15 matching lines @@
 copy("qunit") {
   sources = [
     "//third_party/qunit/src/browser_test_harness.js",
     "//third_party/qunit/src/qunit.css",
     "//third_party/qunit/src/qunit.js",
   ]
   outputs = [
     "$remoting_unit_test_out_dir/qunit/{{source_file_part}}",
   ]
 }
+
+action("build_unittest") {
+  script = "build-html.py"
+  outputs = [
+    "$remoting_unit_test_out_dir/unittests.html",
+  ]
+  args = rebase_path(outputs, root_build_dir) + [
+           rebase_path(remoting_webapp_unittests_template_main, root_build_dir),
+           "--exclude-js",
+         ] + rebase_path(remoting_webapp_unittests_exclude_js_files,
+                         root_build_dir) + [ "--js" ] +
+         rebase_path(remoting_webapp_unittests_all_js_files, root_build_dir) +
+         [ "--instrument-js" ] + rebase_path(webapp_js_files, root_build_dir)
+}