Re-write many calls to WrapUnique() with MakeUnique()

net/proxy/dhcp_proxy_script_fetcher_factory.cc

Index: net/proxy/dhcp_proxy_script_fetcher_factory.cc
diff --git a/net/proxy/dhcp_proxy_script_fetcher_factory.cc b/net/proxy/dhcp_proxy_script_fetcher_factory.cc
index f663d79d3ea89e4e0bf2b190fcff70efca614396..1ebe225b455384298fcae8a520bb07dbe7a58a32 100644
--- a/net/proxy/dhcp_proxy_script_fetcher_factory.cc
+++ b/net/proxy/dhcp_proxy_script_fetcher_factory.cc
@@ -22,7 +22,7 @@ DhcpProxyScriptFetcherFactory::DhcpProxyScriptFetcherFactory()
 std::unique_ptr<DhcpProxyScriptFetcher> DhcpProxyScriptFetcherFactory::Create(
     URLRequestContext* context) {
   if (!feature_enabled_) {
-    return base::WrapUnique(new DoNothingDhcpProxyScriptFetcher());
+    return base::MakeUnique<DoNothingDhcpProxyScriptFetcher>();
   } else {
     DCHECK(IsSupported());
     std::unique_ptr<DhcpProxyScriptFetcher> ret;