EDK: Move {platform_handle,scoped_platform_handle}.* to //mojo/edk/platform.

mojo/edk/system/channel.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.
 
 #include "mojo/edk/system/channel.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "mojo/edk/system/endpoint_relayer.h"
 #include "mojo/edk/system/transport_data.h"
 
-using mojo::embedder::ScopedPlatformHandle;
+using mojo::platform::ScopedPlatformHandle;
 using mojo::util::MakeRefCounted;
 using mojo::util::MutexLocker;
 using mojo::util::RefPtr;
 
 namespace mojo {
 namespace system {
 
 namespace {
 
 struct SerializedEndpoint {
@@ skipping 613 matching lines @@
            << ", local ID " << local_id << ", remote ID " << remote_id;
   std::unique_ptr<MessageInTransit> message(new MessageInTransit(
       MessageInTransit::Type::CHANNEL, subtype, num_bytes, bytes));
   message->set_source_id(local_id);
   message->set_destination_id(remote_id);
   return WriteMessage(std::move(message));
 }
 
 }  // namespace system
 }  // namespace mojo