Revert 187340 "PPAPI: Remove threading options; it's always on"

ppapi/proxy/ppp_instance_private_proxy_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/test/test_timeouts.h"
 #include "base/time.h"
 #include "ppapi/c/dev/ppb_var_deprecated.h"
 #include "ppapi/c/dev/ppp_class_deprecated.h"
@@ skipping 129 matching lines @@
                                      &ppp_instance_private_mock);
       plugin().RegisterTestInterface(PPP_INSTANCE_INTERFACE_1_0,
                                      &ppp_instance_mock);
       host().RegisterTestInterface(PPB_VAR_DEPRECATED_INTERFACE,
                                    &ppb_var_deprecated_mock);
   }
 };
 
 }  // namespace
 
+// TODO(raymes): This #ifdef is only here because we check the state of the
+// plugin globals on the main thread, rather than the plugin thread which causes
+// the thread checker to fail. Once ENABLE_PEPPER_THREADING is the default,
+// this will be safe to do anyway, so we can remove this.
+#ifdef ENABLE_PEPPER_THREADING
 TEST_F(PPP_Instance_Private_ProxyTest, PPPInstancePrivate) {
+#else
+TEST_F(PPP_Instance_Private_ProxyTest, DISABLED_PPPInstancePrivate) {
+#endif
   // This test controls its own instance; we can't use the one that
   // PluginProxyTestHarness provides.
   ASSERT_NE(kInstance, pp_instance());
   HostDispatcher::SetForInstance(kInstance, host().host_dispatcher());
 
   // Requires dev interfaces.
   InterfaceList::SetProcessGlobalPermissions(
       PpapiPermissions::AllPermissions());
 
   // This file-local global is used by the PPP_Instance mock above in order to
@@ skipping 40 matching lines @@
   // Destroy the instance. DidDestroy above decrements the reference count for
   // instance_obj, so it should also be destroyed.
   ppp_instance->DidDestroy(kInstance);
   EXPECT_EQ(-1, plugin().var_tracker().GetRefCountForObject(instance_obj));
   EXPECT_EQ(-1, host().var_tracker().GetRefCountForObject(host_pp_var));
 }
 
 }  // namespace proxy
 }  // namespace ppapi