Fix registerProtocolHandler implementation on Windows 8 and 10.

chrome/browser/shell_integration_win.h

 // Copyright 2016 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 CHROME_BROWSER_SHELL_INTEGRATION_WIN_H_
 #define CHROME_BROWSER_SHELL_INTEGRATION_WIN_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
@@ skipping 18 matching lines @@
     const base::Closure& on_finished_callback);
 
 // Initiates an OS shell flow which (if followed by the user) should set
 // Chrome as the default handler for |protocol|. Returns false if the flow
 // cannot be initialized, if it is not supported (introduced for Windows 8)
 // or if the user cancels the operation. This is a blocking call and requires
 // a FILE thread. If Chrome is already default for |protocol|, no interactive
 // dialog will be shown and this method returns true.
 bool SetAsDefaultProtocolClientUsingIntentPicker(const std::string& protocol);
 
+// Initiates the interaction with the system settings for the default handler of
+// |protocol|. The function takes care of making sure |on_finished_callback|
+// will get called exactly once when the interaction is finished.
+void SetAsDefaultProtocolClientUsingSystemSettings(
+    const std::string& protocol,
+    const base::Closure& on_finished_callback);
+
 // Generates an application user model ID (AppUserModelId) for a given app
 // name and profile path. The returned app id is in the format of
 // "|app_name|[.<profile_id>]". "profile_id" is appended when user override
 // the default value.
 // Note: If the app has an installation specific suffix (e.g. on user-level
 // Chrome installs), |app_name| should already be suffixed, this method will
 // then further suffix it with the profile id as described above.
 base::string16 GetAppModelIdForProfile(const base::string16& app_name,
                                        const base::FilePath& profile_path);
 
@@ skipping 19 matching lines @@
 int MigrateShortcutsInPathInternal(const base::FilePath& chrome_exe,
                                    const base::FilePath& path);
 
 // Returns the path to the Start Menu shortcut for the given Chrome.
 base::FilePath GetStartMenuShortcut(const base::FilePath& chrome_exe);
 
 }  // namespace win
 }  // namespace shell_integration
 
 #endif  // CHROME_BROWSER_SHELL_INTEGRATION_WIN_H_