[net] Change factory methods for HostResolver and HostCache to return a scoped_ptr

chrome/browser/net/connection_tester.cc

Index: chrome/browser/net/connection_tester.cc
diff --git a/chrome/browser/net/connection_tester.cc b/chrome/browser/net/connection_tester.cc
index 2303acae4903f00aacfec5561d7c6d385a742c7f..fba6938c6eeb3a47cc644e5517cf69d2af3c254d 100644
--- a/chrome/browser/net/connection_tester.cc
+++ b/chrome/browser/net/connection_tester.cc
@@ -142,19 +142,19 @@ class ExperimentURLRequestContext : public net::URLRequestContext {
     // Create a vanilla HostResolver that disables caching.
     const size_t kMaxJobs = 50u;
     const size_t kMaxRetryAttempts = 4u;
-    net::HostResolver* impl = net::CreateNonCachingSystemHostResolver(
+    *host_resolver = net::HostResolver::CreateSystemResolver(
         kMaxJobs,
         kMaxRetryAttempts,
+        false /* use_cache */,
+        false /* use_async */,
         NULL /* NetLog */);
 
-    host_resolver->reset(impl);
-
     // Modify it slightly based on the experiment being run.
     switch (experiment) {
       case ConnectionTester::HOST_RESOLVER_EXPERIMENT_PLAIN:
         return net::OK;
       case ConnectionTester::HOST_RESOLVER_EXPERIMENT_DISABLE_IPV6:
-        impl->SetDefaultAddressFamily(net::ADDRESS_FAMILY_IPV4);
+        (*host_resolver)->SetDefaultAddressFamily(net::ADDRESS_FAMILY_IPV4);
         return net::OK;
       case ConnectionTester::HOST_RESOLVER_EXPERIMENT_IPV6_PROBE: {
         // Note that we don't use impl->ProbeIPv6Support() since that finishes
@@ -162,7 +162,7 @@ class ExperimentURLRequestContext : public net::URLRequestContext {
         // So instead we will probe synchronously (might take 100-200 ms).
         net::AddressFamily family = net::TestIPv6Support().ipv6_supported ?
             net::ADDRESS_FAMILY_UNSPECIFIED : net::ADDRESS_FAMILY_IPV4;
-        impl->SetDefaultAddressFamily(family);
+        (*host_resolver)->SetDefaultAddressFamily(family);
         return net::OK;
       }
       default: