Remove GYP annotations from chrome, ui, tools GN files.

chrome/test/media_router/BUILD.gn

 # Copyright 2015 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.
 
 # Browser test resource files.
 media_router_integration_test_resources = [
   "resources/basic_test.html",
   "resources/close_route_with_error_on_send.json",
   "resources/common.js",
   "resources/fail_create_route.json",
   "resources/fail_reconnect_session.html",
   "resources/fail_reconnect_session.json",
   "resources/no_provider.json",
   "resources/no_sinks.json",
   "resources/no_supported_sinks.json",
   "resources/route_creation_timed_out.json",
 ]
 
 media_router_test_extension_resources = [
   "telemetry/extension/manifest.json",
   "telemetry/extension/script.js",
 ]
 
-# GYP version: chrome/test/media_router/media_router_tests.gypi:
-# media_router_test_extension_files
 copy("test_extension_resource_files") {
   sources = media_router_test_extension_resources
   outputs = [
     "$root_out_dir/media_router/test_extension/{{source_file_part}}",
   ]
 }
 
-# GYP version: chrome/test/media_router/media_router_tests.gypi:
-# media_router_integration_test_files
 copy("browser_tests_resource_files") {
   sources = media_router_integration_test_resources
   outputs = [
     "$root_out_dir/media_router/browser_test_resources/{{source_file_part}}",
   ]
 }
 
 source_set("media_router_browsertests") {
   testonly = true
   defines = [ "HAS_OUT_OF_PROC_TEST_RUNNER" ]
@@ skipping 11 matching lines @@
   ]
   deps = [
     ":browser_tests_resource_files",
     "//chrome/browser/media/router:test_support",
     "//chrome/test:test_support",
     "//chrome/test:test_support_ui",
     "//skia",
     "//testing/gtest",
   ]
 }