Isolate gin_unittests and add them to bots

gin/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.
 
 import("//build_overrides/v8.gni")
 import("//testing/test.gni")
 
 component("gin") {
   sources = [
     "arguments.cc",
@@ skipping 159 matching lines @@
     "per_context_data_unittest.cc",
     "shell/gin_shell_unittest.cc",
     "shell_runner_unittest.cc",
     "test/run_all_unittests.cc",
     "test/run_js_tests.cc",
     "v8_isolate_memory_dump_provider_unittest.cc",
     "wrappable_unittest.cc",
   ]
 
   deps = [
+    ":gin_shell",
     ":gin_test",
     "//base/test:test_support",
     "//v8",
   ]
 }
+
+# TODO(GYP): Delete this after we've converted everything to GN.
+# The _run targets exist only for compatibility w/ GYP.
+group("gin_unittests_run") {
+  testonly = true
+  deps = [
+    ":gin_unittests",
+  ]
+}