(Temporarily?) disable building JS targets on mac hosts

mojo/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/config/ui.gni")
 import("//build/module_args/mojo.gni")
 import("//mojo/public/mojo.gni")
 
 # TODO(beng): this meta target should probably move to the root dir's BUILD.gn.
 group("mojo") {
@@ skipping 35 matching lines @@
       "//mojo/nacl:mojo_nacl_tests",
     ]
   }
 }
 
 group("tests") {
   testonly = true
   deps = [
     "//mojo/common:mojo_common_unittests",
     "//mojo/converters/surfaces/tests:mojo_surfaces_lib_unittests",
-    "//mojo/edk/js:tests",
     "//mojo/edk/system:tests",
     "//mojo/edk/test:public_tests",
     "//mojo/dart/embedder/test:dart_unittests",
     "//mojo/public/cpp/bindings/tests:versioning_apptests",
     "//mojo/services/view_manager/public/cpp/tests:mojo_view_manager_lib_unittests",
     "//mojo/tests:mojo_task_tracker_perftests",
     "//mojo/tools:message_generator",
     "//services/clipboard:apptests",
     "//services/dart/dart_apptests",
     "//services/files:apptests",
     "//services/http_server:apptests",
-    "//services/js:js_apptests",
-    "//services/js:js_services_unittests",
     "//services/reaper:tests",
     "//services/url_response_disk_cache:tests",
     "//services/view_manager:mojo_view_manager_client_apptests",
     "//services/view_manager:view_manager_service_apptests",
     "//services/view_manager:view_manager_service_unittests",
     "//services/window_manager:window_manager_apptests",
     "//services/window_manager:window_manager_unittests",
     "//shell:apptests",
   ]
 
   if (is_linux) {
     deps += [
       # TODO(vtl): See TODO in //services/files/c/BUILD.gn.
       "//services/files/c:apptests",
       "//services/python:python_apptests",
     ]
   }
 
+  # TODO(jamesr): We only support building V8 snapshot data on a linux host since it
+  # needs a 32 bit toolchain and we don't have one configured for mac hosts.
+  if (host_os == "linux") {
+    deps += [
+      "//mojo/edk/js:tests",
+      "//services/js:js_apptests",
+      "//services/js:js_services_unittests",
+    ]
+  }
+
   if (mojo_use_prebuilt_network_service) {
     deps += [ "//mojo/public/tools:copy_network_service_apptests" ]
   }
 }