Remove ash_unittests/mash_unittests from Windows build targets

mash/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.
 
 import("//services/service_manager/public/service_manifest.gni")
 import("//testing/test.gni")
 
 # Target that builders build.
 group("all") {
   testonly = true
 
   deps = [
     "//components/leveldb",
     "//mash/catalog_viewer",
     "//mash/example",
     "//mash/init",
     "//mash/login",
     "//mash/screenlock",
     "//mash/session",
     "//mash/simple_wm",
     "//mash/task_viewer",
   ]
 
   # Build on platforms that support ash.
-  if (is_win || is_chromeos) {
+  if (is_chromeos) {
     deps += [ "//mash:mash_unittests" ]
   }
 }
 
 group("browser") {
   testonly = true
 
   deps = [
     ":all",
     "//mash/browser",
     "//mash/webtest",
   ]
 }
 
-test("mash_unittests") {
-  sources = [
-    "test/mash_test_suite.cc",
-    "test/mash_test_suite.h",
-    "test/mash_unittests.cc",
-  ]
-  deps = [
-    "//ash/common:unittests",
-    "//ash/common/test:test_support",
-    "//ash/mus:resources",
-    "//ash/mus:unittests",
-    "//base",
-    "//base/test:test_support",
-    "//services/service_manager/background:main",
-    "//ui/aura",
-    "//ui/base",
-    "//ui/compositor:test_support",
-    "//ui/gl:test_support",
-  ]
-  data_deps = [
-    ":unittests_manifest",
-    "//ash/mus:resources",
-  ]
+if (is_chromeos) {
+  # TODO(jamescook): Move these tests into //ash/mus.
+  test("mash_unittests") {
+    sources = [
+      "test/mash_test_suite.cc",
+      "test/mash_test_suite.h",
+      "test/mash_unittests.cc",
+    ]
+    deps = [
+      "//ash/common:unittests",
+      "//ash/common/test:test_support",
+      "//ash/mus:resources",
+      "//ash/mus:unittests",
+      "//base",
+      "//base/test:test_support",
+      "//services/service_manager/background:main",
+      "//ui/aura",
+      "//ui/base",
+      "//ui/compositor:test_support",
+      "//ui/gl:test_support",
+    ]
+    data_deps = [
+      ":unittests_manifest",
+      "//ash/mus:resources",
+    ]
+  }
+
+  service_manifest("unittests_manifest") {
+    name = "mash_unittests"
+    source = "unittests_manifest.json"
+  }
 }
-
-service_manifest("unittests_manifest") {
-  name = "mash_unittests"
-  source = "unittests_manifest.json"
-}