Isolate gin_unittests and add them to bots

testing/buildbot/gn_isolate_map.pyl

 ## 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.
 
 # gn_isolate_map.pyl - A mapping of Ninja build target names to GN labels and
 # test type classifications for the tests that are run on the bots.
 #
 # This mapping is used by MB so that we can uniformly refer to test binaries
 # by their Ninja target names in the recipes and not need to worry about how
 # they are referred to in GN or GYP specifically (the GYP target name is pretty
@@ skipping 175 matching lines @@
   },
   "gcm_unit_tests": {
     "label": "//google_apis/gcm:gcm_unit_tests",
     "type": "console_test_launcher",
   },
   "gfx_unittests": {
     "label": "//ui/gfx:gfx_unittests",
     "type": "raw",
     "args": [],
   },
+  "gin_unittests": {
+    "label": "//gin:gin_unittests",
+    "type": "console_test_launcher",
+  },
   "gles2_conform_test": {
     "label": "//gpu/gles2_conform_support:gles2_conform_test",
     "type": "console_test_launcher",
   },
   "gl_tests": {
     "label": "//gpu:gl_tests",
     "type": "raw",
     "args": [],
   },
   "gl_unittests": {
@@ skipping 263 matching lines @@
   },
   "wm_unittests": {
     "label": "//ui/wm:wm_unittests",
     "type": "windowed_test_launcher",
   },
   "wtf_unittests": {
     "label": "//third_party/WebKit/public:wtf_unittests",
     "type": "unknown",
   },
 }