Remove stl_util's deletion functions from net/proxy/.

net/proxy/proxy_config_service_win.h

Index: net/proxy/proxy_config_service_win.h
diff --git a/net/proxy/proxy_config_service_win.h b/net/proxy/proxy_config_service_win.h
index ce17e05700b1e1db53f1ce254004f8e1c123f3c4..0b54050f4ec76817861e44867271befb08d66c2d 100644
--- a/net/proxy/proxy_config_service_win.h
+++ b/net/proxy/proxy_config_service_win.h
@@ -8,6 +8,7 @@
 #include <windows.h>
 #include <winhttp.h>
 
+#include <memory>
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ -55,7 +56,6 @@ class NET_EXPORT_PRIVATE ProxyConfigServiceWin
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ProxyConfigServiceWinTest, SetFromIEConfig);
-  typedef std::vector<base::win::RegKey*> RegKeyList;
 
   // Registers change observers on the registry keys relating to proxy settings.
   void StartWatchingRegistryForChanges();
@@ -74,7 +74,7 @@ class NET_EXPORT_PRIVATE ProxyConfigServiceWin
       ProxyConfig* config,
       const WINHTTP_CURRENT_USER_IE_PROXY_CONFIG& ie_config);
 
-  RegKeyList keys_to_watch_;
+  std::vector<std::unique_ptr<base::win::RegKey>> keys_to_watch_;
 };
 
 }  // namespace net