Move PlatformChannelPair to //mojo/edk/platform and rename it PlatformPipe.

mojo/edk/base_edk/platform_pipe.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.
 
-#include "mojo/edk/embedder/platform_channel_pair.h"
+// This file implements the class declared in
+// //mojo/edk/platform/platform_pipe.h.
+
+#include "mojo/edk/platform/platform_pipe.h"
 
 #include <fcntl.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "mojo/edk/platform/platform_handle.h"
 
-using mojo::platform::PlatformHandle;
+namespace mojo {
+namespace platform {
 
-namespace mojo {
-namespace embedder {
-
-PlatformChannelPair::PlatformChannelPair() {
+PlatformPipe::PlatformPipe() {
   // Create the Unix domain socket and set the ends to nonblocking.
   int fds[2];
   // TODO(vtl): Maybe fail gracefully if |socketpair()| fails.
   PCHECK(socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0);
   PCHECK(fcntl(fds[0], F_SETFL, O_NONBLOCK) == 0);
   PCHECK(fcntl(fds[1], F_SETFL, O_NONBLOCK) == 0);
 
 #if defined(OS_MACOSX)
   // This turns off |SIGPIPE| when writing to a closed socket (causing it to
   // fail with |EPIPE| instead). On Linux, we have to use |send...()| with
   // |MSG_NOSIGNAL| -- which is not supported on Mac -- instead.
   int no_sigpipe = 1;
   PCHECK(setsockopt(fds[0], SOL_SOCKET, SO_NOSIGPIPE, &no_sigpipe,
                     sizeof(no_sigpipe)) == 0);
   PCHECK(setsockopt(fds[1], SOL_SOCKET, SO_NOSIGPIPE, &no_sigpipe,
                     sizeof(no_sigpipe)) == 0);
 #endif  // defined(OS_MACOSX)
 
   handle0.reset(PlatformHandle(fds[0]));
   DCHECK(handle0.is_valid());
   handle1.reset(PlatformHandle(fds[1]));
   DCHECK(handle1.is_valid());
 }
 
-PlatformChannelPair::~PlatformChannelPair() {}
+PlatformPipe::~PlatformPipe() {}
 
-}  // namespace embedder
+}  // namespace platform
 }  // namespace mojo