Initial support for built-in DNS resolver/cache.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/3693001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@64202 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 9 insertions, 7 deletions

diff --git a/net/base/host_resolver.h b/net/base/host_resolver.h
index 2fb7067..471ad8a 100644
--- a/net/base/host_resolver.h
+++ b/net/base/host_resolver.h
@@ -20,6 +20,7 @@ namespace net {
 class AddressList;
 class BoundNetLog;
 class HostResolverImpl;
+class HostResolverProc;
 class NetLog;
 
 // This class represents the task of resolving hostnames (or IP address
@@ -230,13 +231,13 @@ class SingleRequestHostResolver {
   DISALLOW_COPY_AND_ASSIGN(SingleRequestHostResolver);
 };
 
-// Creates a HostResolver implementation that queries the underlying system.
-// (Except if a unit-test has changed the global HostResolverProc using
-// ScopedHostResolverProc to intercept requests to the system).
-// |max_concurrent_resolves| is how many resolve requests will be allowed to
-// run in parallel. Pass HostResolver::kDefaultParallelism to choose a
-// default value.
+// Creates a HostResolver implementation using |resolver_proc| as resolver,
+// (which if NULL, will default to getaddrinfo() wrapper) that queries the
+// underlying system, |max_concurrent_resolves| is how many resolve
+// requests will be allowed to run in parallel. Pass
+// HostResolver::kDefaultParallelism to choose a default value.
 HostResolver* CreateSystemHostResolver(size_t max_concurrent_resolves,
+                                       HostResolverProc* resolver_proc,
                                        NetLog* net_log);
 
 }  // namespace net
diff --git a/net/base/host_resolver_impl.cc b/net/base/host_resolver_impl.cc
index 246f50a..13dce85 100644
--- a/net/base/host_resolver_impl.cc
+++ b/net/base/host_resolver_impl.cc
@@ -72,6 +72,7 @@ HostCache* CreateDefaultCache() {
 }  // anonymous namespace
 
 HostResolver* CreateSystemHostResolver(size_t max_concurrent_resolves,
+                                       HostResolverProc* resolver_proc,
                                        NetLog* net_log) {
   // Maximum of 50 concurrent threads.
   // TODO(eroman): Adjust this, do some A/B experiments.
@@ -81,7 +82,7 @@ HostResolver* CreateSystemHostResolver(size_t max_concurrent_resolves,
     max_concurrent_resolves = kDefaultMaxJobs;
 
   HostResolverImpl* resolver =
-      new HostResolverImpl(NULL, CreateDefaultCache(),
+      new HostResolverImpl(resolver_proc, CreateDefaultCache(),
                            max_concurrent_resolves, net_log);
 
   return resolver;