Remove ash_unittests/mash_unittests from Windows build targets

mash/BUILD.gn

Index: mash/BUILD.gn
diff --git a/mash/BUILD.gn b/mash/BUILD.gn
index c1eb630e10b139b55e733a7eb451212cbbd3fb1f..bc6acf62ea43d6c9e1a373df2d071482f79e8248 100644
--- a/mash/BUILD.gn
+++ b/mash/BUILD.gn
@@ -22,7 +22,7 @@ group("all") {
   ]
 
   # Build on platforms that support ash.
-  if (is_win || is_chromeos) {
+  if (is_chromeos) {
     deps += [ "//mash:mash_unittests" ]
   }
 }
@@ -37,32 +37,35 @@ group("browser") {
   ]
 }
 
-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"
+  }
 }