Remove some #ifdef __native_client__ on tests.

mojo/public/cpp/system/tests/core_unittest.cc

 // 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.
 
 // This file tests the C++ Mojo system core wrappers.
 // TODO(vtl): Maybe rename "CoreCppTest" -> "CoreTest" if/when this gets
 // compiled into a different binary from the C API tests.
 
 #include <stddef.h>
 
@@ skipping 526 matching lines @@
 
   {
     WaitManyResult wmr(MOJO_RESULT_FAILED_PRECONDITION, 5u);
     EXPECT_TRUE(wmr.IsIndexValid());
     EXPECT_TRUE(wmr.AreSignalsStatesValid());
     EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, wmr.result);
     EXPECT_EQ(5u, wmr.index);
   }
 }
 
-// TODO(ncbray): enable this test once NaCl supports the corresponding APIs.
-#ifdef __native_client__
-#define MAYBE_DataPipe DISABLED_DataPipe
-#else
-#define MAYBE_DataPipe DataPipe
-#endif
-TEST(CoreCppTest, MAYBE_DataPipe) {
+TEST(CoreCppTest, DataPipe) {
   ScopedDataPipeProducerHandle ph;
   ScopedDataPipeConsumerHandle ch;
 
   ASSERT_EQ(MOJO_RESULT_OK, CreateDataPipe(nullptr, &ph, &ch));
   ASSERT_TRUE(ph.get().is_valid());
   ASSERT_TRUE(ch.get().is_valid());
 
   uint32_t read_threshold = 123u;
   EXPECT_EQ(MOJO_RESULT_OK,
             GetDataPipeConsumerOptions(ch.get(), &read_threshold));
@@ skipping 80 matching lines @@
   // Close the producer.
   ph.reset();
 
   // Waiting for "read" should now fail.
   EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION,
             Wait(ch.get(), MOJO_HANDLE_SIGNAL_READ_THRESHOLD, 1000, nullptr));
 }
 
 }  // namespace
 }  // namespace mojo