net: move host_resolver files from net/base to net/dns

net/base/single_request_host_resolver.cc

Index: net/base/single_request_host_resolver.cc
diff --git a/net/base/single_request_host_resolver.cc b/net/base/single_request_host_resolver.cc
deleted file mode 100644
index b975c0092df1680c7509e5514ee1d4e32d878def..0000000000000000000000000000000000000000
--- a/net/base/single_request_host_resolver.cc
+++ /dev/null
@@ -1,77 +0,0 @@
-// Copyright (c) 2011 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 "net/base/single_request_host_resolver.h"
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/compiler_specific.h"
-#include "base/logging.h"
-#include "net/base/net_errors.h"
-
-namespace net {
-
-SingleRequestHostResolver::SingleRequestHostResolver(HostResolver* resolver)
-    : resolver_(resolver),
-      cur_request_(NULL),
-      ALLOW_THIS_IN_INITIALIZER_LIST(callback_(
-          base::Bind(&SingleRequestHostResolver::OnResolveCompletion,
-                     base::Unretained(this)))) {
-  DCHECK(resolver_ != NULL);
-}
-
-SingleRequestHostResolver::~SingleRequestHostResolver() {
-  Cancel();
-}
-
-int SingleRequestHostResolver::Resolve(
-    const HostResolver::RequestInfo& info, AddressList* addresses,
-    const CompletionCallback& callback, const BoundNetLog& net_log) {
-  DCHECK(addresses);
-  DCHECK_EQ(false, callback.is_null());
-  DCHECK(cur_request_callback_.is_null()) << "resolver already in use";
-
-  HostResolver::RequestHandle request = NULL;
-
-  // We need to be notified of completion before |callback| is called, so that
-  // we can clear out |cur_request_*|.
-  CompletionCallback transient_callback =
-      callback.is_null() ? CompletionCallback() : callback_;
-
-  int rv = resolver_->Resolve(
-      info, addresses, transient_callback, &request, net_log);
-
-  if (rv == ERR_IO_PENDING) {
-    DCHECK_EQ(false, callback.is_null());
-    // Cleared in OnResolveCompletion().
-    cur_request_ = request;
-    cur_request_callback_ = callback;
-  }
-
-  return rv;
-}
-
-void SingleRequestHostResolver::Cancel() {
-  if (!cur_request_callback_.is_null()) {
-    resolver_->CancelRequest(cur_request_);
-    cur_request_ = NULL;
-    cur_request_callback_.Reset();
-  }
-}
-
-void SingleRequestHostResolver::OnResolveCompletion(int result) {
-  DCHECK(cur_request_);
-  DCHECK_EQ(false, cur_request_callback_.is_null());
-
-  CompletionCallback callback = cur_request_callback_;
-
-  // Clear the outstanding request information.
-  cur_request_ = NULL;
-  cur_request_callback_.Reset();
-
-  // Call the user's original callback.
-  callback.Run(result);
-}
-
-}  // namespace net