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

net/proxy/proxy_script_fetcher_impl_unittest.cc

Index: net/proxy/proxy_script_fetcher_impl_unittest.cc
diff --git a/net/proxy/proxy_script_fetcher_impl_unittest.cc b/net/proxy/proxy_script_fetcher_impl_unittest.cc
index 5fc8099df953eec2a225be57dca0132b6eaa231e..b92cf481de25be615a5c3607f246c6be3ac34fb7 100644
--- a/net/proxy/proxy_script_fetcher_impl_unittest.cc
+++ b/net/proxy/proxy_script_fetcher_impl_unittest.cc
@@ -73,7 +73,7 @@ class RequestContext : public URLRequestContext {
  public:
   RequestContext() : ALLOW_THIS_IN_INITIALIZER_LIST(storage_(this)) {
     ProxyConfig no_proxy;
-    storage_.set_host_resolver(new MockHostResolver);
+    storage_.set_host_resolver(scoped_ptr<HostResolver>(new MockHostResolver));
     storage_.set_cert_verifier(new MockCertVerifier);
     storage_.set_proxy_service(ProxyService::CreateFixed(no_proxy));
     storage_.set_ssl_config_service(new SSLConfigServiceDefaults);