Revert of Remove raw handles from base::win::RegKey

net/proxy/proxy_config_service_win.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_PROXY_PROXY_CONFIG_SERVICE_WIN_H_
 #define NET_PROXY_PROXY_CONFIG_SERVICE_WIN_H_
 
 #include <windows.h>
 #include <winhttp.h>
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
+#include "base/win/object_watcher.h"
 #include "net/proxy/polling_proxy_config_service.h"
 
-namespace base {
-namespace win {
-class RegKey;
-}
-}  // namespace base.
-
 namespace net {
 
 // Implementation of ProxyConfigService that retrieves the system proxy
 // settings.
 //
 // It works by calling WinHttpGetIEProxyConfigForCurrentUser() to fetch the
 // Internet Explorer proxy settings.
 //
 // We use two different strategies to notice when the configuration has
 // changed:
 //
 // (1) Watch the internet explorer settings registry keys for changes. When
 //     one of the registry keys pertaining to proxy settings has changed, we
 //     call WinHttpGetIEProxyConfigForCurrentUser() again to read the
 //     configuration's new value.
 //
 // (2) Do regular polling every 10 seconds during network activity to see if
 //     WinHttpGetIEProxyConfigForCurrentUser() returns something different.
 //
 // Ideally strategy (1) should be sufficient to pick up all of the changes.
 // However we still do the regular polling as a precaution in case the
 // implementation details of  WinHttpGetIEProxyConfigForCurrentUser() ever
 // change, or in case we got it wrong (and are not checking all possible
 // registry dependencies).
 class NET_EXPORT_PRIVATE ProxyConfigServiceWin
-    : public PollingProxyConfigService {
+    : public PollingProxyConfigService,
+      public base::win::ObjectWatcher::Delegate {
  public:
   ProxyConfigServiceWin();
   virtual ~ProxyConfigServiceWin();
 
   // Overrides a function from PollingProxyConfigService.
   virtual void AddObserver(Observer* observer) override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ProxyConfigServiceWinTest, SetFromIEConfig);
-  typedef std::vector<base::win::RegKey*> RegKeyList;
+  class KeyEntry;
+  typedef std::vector<KeyEntry*> KeyEntryList;
 
   // Registers change observers on the registry keys relating to proxy settings.
   void StartWatchingRegistryForChanges();
 
-  // Creates a new key and appends it to |keys_to_watch_|. If the key fails to
-  // be created, it is not appended to the list and we return false.
+  // Creates a new KeyEntry and appends it to |keys_to_watch_|. If the key
+  // fails to be created, it is not appended to the list and we return false.
   bool AddKeyToWatchList(HKEY rootkey, const wchar_t* subkey);
 
+  // ObjectWatcher::Delegate methods:
   // This is called whenever one of the registry keys we are watching change.
-  void OnObjectSignaled(base::win::RegKey* key);
+  virtual void OnObjectSignaled(HANDLE object) override;
 
   static void GetCurrentProxyConfig(ProxyConfig* config);
 
   // Set |config| using the proxy configuration values of |ie_config|.
   static void SetFromIEConfig(
       ProxyConfig* config,
       const WINHTTP_CURRENT_USER_IE_PROXY_CONFIG& ie_config);
 
-  RegKeyList keys_to_watch_;
+  KeyEntryList keys_to_watch_;
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_CONFIG_SERVICE_WIN_H_