Plumb MojoReplaceHandleWithReducedRights() out.

mojo/public/c/system/tests/data_pipe_unittest.cc

 // Copyright 2016 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 data pipe API (the functions declared in
 // mojo/public/c/system/data_pipe.h).
 
 #include <string.h>
 
 #include "mojo/public/c/system/data_pipe.h"
 #include "mojo/public/c/system/handle.h"
 #include "mojo/public/c/system/result.h"
 #include "mojo/public/c/system/wait.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 const MojoHandleRights kDefaultDataPipeProducerHandleRights =
     MOJO_HANDLE_RIGHT_TRANSFER | MOJO_HANDLE_RIGHT_WRITE |
     MOJO_HANDLE_RIGHT_GET_OPTIONS | MOJO_HANDLE_RIGHT_SET_OPTIONS;
 const MojoHandleRights kDefaultDataPipeConsumerHandleRights =
     MOJO_HANDLE_RIGHT_TRANSFER | MOJO_HANDLE_RIGHT_READ |
     MOJO_HANDLE_RIGHT_GET_OPTIONS | MOJO_HANDLE_RIGHT_SET_OPTIONS;
 
 TEST(DataPipeTest, InvalidHandle) {
-  // Data pipe:
   MojoDataPipeProducerOptions dpp_options = {
       sizeof(MojoDataPipeProducerOptions), 0u};
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
             MojoSetDataPipeProducerOptions(MOJO_HANDLE_INVALID, &dpp_options));
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
             MojoGetDataPipeProducerOptions(
                 MOJO_HANDLE_INVALID, &dpp_options,
                 static_cast<uint32_t>(sizeof(dpp_options))));
   char buffer[10] = {};
   uint32_t buffer_size = static_cast<uint32_t>(sizeof(buffer));
@@ skipping 400 matching lines @@
   EXPECT_EQ(MOJO_RESULT_OK,
             MojoWait(hc, MOJO_HANDLE_SIGNAL_READ_THRESHOLD, 0, nullptr));
 
   EXPECT_EQ(MOJO_RESULT_OK, MojoClose(hp));
   EXPECT_EQ(MOJO_RESULT_OK, MojoClose(hc));
 }
 
 // TODO(vtl): Add multi-threaded tests.
 
 }  // namespace