Add unit-tests for SingleRequestHostResolver.

net/base/host_resolver.cc

 // 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/host_resolver.h"
 
-#include "base/compiler_specific.h"
-#include "base/logging.h"
-#include "net/base/net_errors.h"
-
 namespace net {
 
 HostResolver::RequestInfo::RequestInfo(const HostPortPair& host_port_pair)
     : host_port_pair_(host_port_pair),
       address_family_(ADDRESS_FAMILY_UNSPECIFIED),
       host_resolver_flags_(0),
       allow_cached_response_(true),
       only_use_cached_response_(false),
       is_speculative_(false),
       priority_(MEDIUM) {
 }
 
 HostResolver::~HostResolver() {
 }
 
 AddressFamily HostResolver::GetDefaultAddressFamily() const {
   return ADDRESS_FAMILY_UNSPECIFIED;
 }
 
 HostResolverImpl* HostResolver::GetAsHostResolverImpl() {
   return NULL;
 }
 
 HostResolver::HostResolver() {
 }
 
-SingleRequestHostResolver::SingleRequestHostResolver(HostResolver* resolver)
-    : resolver_(resolver),
-      cur_request_(NULL),
-      cur_request_callback_(NULL),
-      ALLOW_THIS_IN_INITIALIZER_LIST(
-          callback_(this, &SingleRequestHostResolver::OnResolveCompletion)) {
-  DCHECK(resolver_ != NULL);
-}
-
-SingleRequestHostResolver::~SingleRequestHostResolver() {
-  Cancel();
-}
-
-int SingleRequestHostResolver::Resolve(const HostResolver::RequestInfo& info,
-                                       AddressList* addresses,
-                                       CompletionCallback* callback,
-                                       const BoundNetLog& net_log) {
-  DCHECK(!cur_request_ && !cur_request_callback_) << "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 ? &callback_ : NULL;
-
-  int rv = resolver_->Resolve(
-      info, addresses, transient_callback, &request, net_log);
-
-  if (rv == ERR_IO_PENDING) {
-    // Cleared in OnResolveCompletion().
-    cur_request_ = request;
-    cur_request_callback_ = callback;
-  }
-
-  return rv;
-}
-
-void SingleRequestHostResolver::Cancel() {
-  if (cur_request_) {
-    resolver_->CancelRequest(cur_request_);
-    cur_request_ = NULL;
-  }
-}
-
-void SingleRequestHostResolver::OnResolveCompletion(int result) {
-  DCHECK(cur_request_ && cur_request_callback_);
-
-  CompletionCallback* callback = cur_request_callback_;
-
-  // Clear the outstanding request information.
-  cur_request_ = NULL;
-  cur_request_callback_ = NULL;
-
-  // Call the user's original callback.
-  callback->Run(result);
-}
-
 }  // namespace net