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

net/base/host_resolver.cc

Index: net/base/host_resolver.cc
diff --git a/net/base/host_resolver.cc b/net/base/host_resolver.cc
deleted file mode 100644
index 7d98dd6fdeaa523e767670bc0bbf1bb344f5c67d..0000000000000000000000000000000000000000
--- a/net/base/host_resolver.cc
+++ /dev/null
@@ -1,148 +0,0 @@
-// 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 "net/base/host_resolver.h"
-
-#include "base/logging.h"
-#include "base/metrics/field_trial.h"
-#include "base/string_number_conversions.h"
-#include "base/strings/string_split.h"
-#include "net/base/host_cache.h"
-#include "net/base/host_resolver_impl.h"
-#include "net/dns/dns_client.h"
-#include "net/dns/dns_config_service.h"
-
-namespace net {
-
-namespace {
-
-// Maximum of 6 concurrent resolver threads (excluding retries).
-// Some routers (or resolvers) appear to start to provide host-not-found if
-// too many simultaneous resolutions are pending.  This number needs to be
-// further optimized, but 8 is what FF currently does. We found some routers
-// that limit this to 6, so we're temporarily holding it at that level.
-const size_t kDefaultMaxProcTasks = 6u;
-
-// When configuring from field trial, do not allow
-const size_t kSaneMaxProcTasks = 20u;
-
-PrioritizedDispatcher::Limits GetDispatcherLimits(
-    const HostResolver::Options& options) {
-  PrioritizedDispatcher::Limits limits(NUM_PRIORITIES,
-                                       options.max_concurrent_resolves);
-
-  // If not using default, do not use the field trial.
-  if (limits.total_jobs != HostResolver::kDefaultParallelism)
-    return limits;
-
-  // Default, without trial is no reserved slots.
-  limits.total_jobs = kDefaultMaxProcTasks;
-
-  // Parallelism is determined by the field trial.
-  std::string group = base::FieldTrialList::FindFullName(
-      "HostResolverDispatch");
-
-  if (group.empty())
-    return limits;
-
-  // The format of the group name is a list of non-negative integers separated
-  // by ':'. Each of the elements in the list corresponds to an element in
-  // |reserved_slots|, except the last one which is the |total_jobs|.
-
-  std::vector<std::string> group_parts;
-  base::SplitString(group, ':', &group_parts);
-  if (group_parts.size() != NUM_PRIORITIES + 1) {
-    NOTREACHED();
-    return limits;
-  }
-
-  std::vector<size_t> parsed(group_parts.size());
-  size_t total_reserved_slots = 0;
-
-  for (size_t i = 0; i < group_parts.size(); ++i) {
-    if (!base::StringToSizeT(group_parts[i], &parsed[i])) {
-      NOTREACHED();
-      return limits;
-    }
-  }
-
-  size_t total_jobs = parsed.back();
-  parsed.pop_back();
-  for (size_t i = 0; i < parsed.size(); ++i) {
-    total_reserved_slots += parsed[i];
-  }
-
-  // There must be some unreserved slots available for the all priorities.
-  if (total_reserved_slots > total_jobs ||
-      (total_reserved_slots == total_jobs && parsed[MINIMUM_PRIORITY] == 0)) {
-    NOTREACHED();
-    return limits;
-  }
-
-  limits.total_jobs = total_jobs;
-  limits.reserved_slots = parsed;
-  return limits;
-}
-
-}  // namespace
-
-HostResolver::Options::Options()
-    : max_concurrent_resolves(kDefaultParallelism),
-      max_retry_attempts(kDefaultRetryAttempts),
-      enable_caching(true) {
-}
-
-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),
-      is_speculative_(false),
-      priority_(MEDIUM) {
-}
-
-HostResolver::~HostResolver() {
-}
-
-AddressFamily HostResolver::GetDefaultAddressFamily() const {
-  return ADDRESS_FAMILY_UNSPECIFIED;
-}
-
-void HostResolver::ProbeIPv6Support() {
-}
-
-void HostResolver::SetDnsClientEnabled(bool enabled) {
-}
-
-HostCache* HostResolver::GetHostCache() {
-  return NULL;
-}
-
-base::Value* HostResolver::GetDnsConfigAsValue() const {
-  return NULL;
-}
-
-// static
-scoped_ptr<HostResolver>
-HostResolver::CreateSystemResolver(const Options& options, NetLog* net_log) {
-  scoped_ptr<HostCache> cache;
-  if (options.enable_caching)
-    cache = HostCache::CreateDefaultCache();
-  return scoped_ptr<HostResolver>(new HostResolverImpl(
-      cache.Pass(),
-      GetDispatcherLimits(options),
-      HostResolverImpl::ProcTaskParams(NULL, options.max_retry_attempts),
-      net_log));
-}
-
-// static
-scoped_ptr<HostResolver>
-HostResolver::CreateDefaultResolver(NetLog* net_log) {
-  return CreateSystemResolver(Options(), net_log);
-}
-
-HostResolver::HostResolver() {
-}
-
-}  // namespace net