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

mojo/edk/system/channel_test_base.cc

 // Copyright 2015 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/system/channel_test_base.h"
 
 #include <utility>
 
 #include "base/logging.h"
-#include "mojo/edk/embedder/platform_channel_pair.h"
+#include "mojo/edk/platform/platform_pipe.h"
 #include "mojo/edk/system/raw_channel.h"
 
+using mojo::platform::PlatformPipe;
 using mojo::util::MakeRefCounted;
 
 namespace mojo {
 namespace system {
 namespace test {
 
 ChannelTestBase::ChannelTestBase()
     : io_thread_(TestIOThread::StartMode::AUTO) {}
 
 ChannelTestBase::~ChannelTestBase() {
@@ skipping 33 matching lines @@
 }
 
 void ChannelTestBase::ShutdownAndReleaseChannelOnIOThread(unsigned i) {
   ShutdownChannelOnIOThread(i);
   channels_[i] = nullptr;
 }
 
 void ChannelTestBase::SetUpOnIOThread() {
   CHECK(io_thread()->IsCurrentAndRunning());
 
-  embedder::PlatformChannelPair channel_pair;
+  PlatformPipe channel_pair;
   raw_channels_[0] = RawChannel::Create(channel_pair.handle0.Pass());
   raw_channels_[1] = RawChannel::Create(channel_pair.handle1.Pass());
 }
 
 }  // namespace test
 }  // namespace system
 }  // namespace mojo