Mojo: Move PlatformChannelPair to its own files.

mojo/system/remote_message_pipe_posix_unittest.cc

 // Copyright 2013 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.
 
 // TODO(vtl): The POSIX-specific bits have been factored out. Apply this test to
 // non-POSIX once we have a non-POSIX implementation.
 
 #include <stdint.h>
 #include <string.h>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "mojo/system/channel.h"
 #include "mojo/system/local_message_pipe_endpoint.h"
 #include "mojo/system/message_pipe.h"
 #include "mojo/system/platform_channel.h"
+#include "mojo/system/platform_channel_pair.h"
 #include "mojo/system/proxy_message_pipe_endpoint.h"
 #include "mojo/system/test_utils.h"
 #include "mojo/system/waiter.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace system {
 namespace {
 
 class RemoteMessagePipeTest : public testing::Test {
@@ skipping 388 matching lines @@
                               MOJO_READ_MESSAGE_FLAG_NONE));
   EXPECT_EQ(sizeof(hello), static_cast<size_t>(buffer_size));
   EXPECT_EQ(0, strcmp(buffer, hello));
 
   // And MP 1, port 1.
   mp_1->Close(1);
 }
 }  // namespace
 }  // namespace system
 }  // namespace mojo