Remove old C++03 move emulation code.

dbus/file_descriptor.cc

 // Copyright (c) 2012 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 <algorithm>
 
 #include "base/bind.h"
 #include "base/files/file.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/threading/worker_pool.h"
 #include "dbus/file_descriptor.h"
 
 using std::swap;
 
 namespace dbus {
 
 void CHROME_DBUS_EXPORT FileDescriptor::Deleter::operator()(
     FileDescriptor* fd) {
   base::WorkerPool::PostTask(
       FROM_HERE, base::Bind(&base::DeletePointer<FileDescriptor>, fd), false);
 }
 
-FileDescriptor::FileDescriptor(RValue other)
-    : value_(-1), owner_(false), valid_(false) {
-  Swap(other.object);
+FileDescriptor::FileDescriptor(FileDescriptor&& other) : FileDescriptor() {
+  Swap(&other);
 }
 
 FileDescriptor::~FileDescriptor() {
   if (owner_)
     base::File auto_closer(value_);
 }
 
-FileDescriptor& FileDescriptor::operator=(RValue other) {
-  Swap(other.object);
+FileDescriptor& FileDescriptor::operator=(FileDescriptor&& other) {
+  Swap(&other);
   return *this;
 }
 
 int FileDescriptor::value() const {
   CHECK(valid_);
   return value_;
 }
 
 int FileDescriptor::TakeValue() {
   CHECK(valid_);  // NB: check first so owner_ is unchanged if this triggers
@@ skipping 14 matching lines @@
   valid_ = (ok && !info.is_directory);
 }
 
 void FileDescriptor::Swap(FileDescriptor* other) {
   swap(value_, other->value_);
   swap(owner_, other->owner_);
   swap(valid_, other->valid_);
 }
 
 }  // namespace dbus