GN support for setup_unittests.

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 834 matching lines @@
   }
 } else if (is_win) {
   group("windows_default_tests") {
     testonly = true
     deps = [
       "//ash:ash_unittests",  # FAILS 4/20/2015
       "//base:base_unittests",  # PASSES 4/20/2015
       "//cc:cc_unittests",  # PASSES 4/17/2015
       "//chrome_elf:chrome_elf_unittests",  # FAILS 4/20/2015
       "//chrome/installer/util:installer_util_unittests",
+      "//chrome/installer/setup:setup_unittests",

[brettw, 2015/07/01 17:08:09]

This list is trying to track the set of tests run on the bots. Is this test run
on the bots? I don't see it. Is it maybe official waterfall only?

To match GYP I believe this would go into the "both_gn_and_gyp" target above
inside a windows condition. Then you should also update build\gn_migration.gypi
and move setup_unittests from the "gyp_only" target to the both_gn_and_gyp one
so the builds are the same.

[grt (UTC plus 2), 2015/07/01 17:38:57]

At the moment, it's none of the above. I'm trying to get them on the bots
(http://crbug.com/153829), so I'd like to put them wherever makes the most sense
for that goal. Are they better placed here or in both_gn_and_gyp?

[grt (UTC plus 2), 2015/07/06 15:20:33]

FYI: I have https://codereview.chromium.org/1219923005/ out for review, which
will have setup_unittests built for the same targets in build/all.gyp as
installer_util_unittests. Thanks.

       "//chrome/test:browser_tests",
       "//chrome/test:interactive_ui_tests",
       "//chrome/test:sync_integration_tests",  # Note: need to turn off incremental linking for debug.
       "//chrome/test:unit_tests",
       "//chrome/test/chromedriver:chromedriver_unittests",  # PASSES 4/20/2015
       "//components:components_browsertests",  # PASSES 4/24/2015
       "//components:components_unittests",  # PASSES 4/17/2015
       "//courgette:courgette_unittests",  # PASSES 4/20/2015
       "//content/test:content_browsertests",
       "//content/test:content_unittests",  # PASSES 4/17/2015
@@ skipping 41 matching lines @@
       "//ui/views:views_unittests",  # TooltipControllerTest failures
       "//ui/wm:wm_unittests",  # PASSES 4/21/2015
       "//url:url_unittests",  # PASSES 4/17/2015
 
       # TODO(GYP) nacl_integration
       # TODO(GYP) telemetry_perf_unittests
       # TODO(GYP) telemetry_unittests
     ]
   }
 }