Fix registerProtocolHandler implementation on Windows 8 and 10.

chrome/installer/util/shell_util.h

 // Copyright (c) 2012 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.
 //
 // This file declares methods that are useful for integrating Chrome in
 // Windows shell. These methods are all static and currently part of
 // ShellUtil class.
 
 #ifndef CHROME_INSTALLER_UTIL_SHELL_UTIL_H_
 #define CHROME_INSTALLER_UTIL_SHELL_UTIL_H_
@@ skipping 390 matching lines @@
   // chrome::kMaxAppModelIdLength (some of the components might have been
   // shortened to enforce this).
   static base::string16 BuildAppModelId(
       const std::vector<base::string16>& components);
 
   // Returns true if Chrome can make itself the default browser without relying
   // on the Windows shell to prompt the user. This is the case for versions of
   // Windows prior to Windows 8.
   static bool CanMakeChromeDefaultUnattended();
 
+  enum SetDefaultInteractiveMode {

[grt (UTC plus 2), 2016/04/15 18:47:26]

wdyt of InteractiveSetDefaultMode so that this doesn't sound like it's going to
run off and do something (SetFoo)? the method below could be
GetInteractiveSetDefaultMode, which sounds a little better to my eyes than
GetSetFoo.

[Patrick Monette, 2016/04/15 21:35:42]

I agree. Done.

+    // The intent picker is opened with the different choices available to the
+    // user.
+    INTENT_PICKER,
+    // The Windows default apps settings page is opened with the current default
+    // app focused.
+    SYSTEM_SETTINGS,
+  };
+
+  // Returns the interactive mode that should be used to set the default browser
+  // or default protocol client on Windows 8+.
+  static SetDefaultInteractiveMode GetSetDefaultInteractiveMode();
+
   // Returns the DefaultState of Chrome for HTTP and HTTPS and updates the
   // default browser beacons as appropriate.
   static DefaultState GetChromeDefaultState();
 
   // Returns the DefaultState of the Chrome instance with the specified path for
   // HTTP and HTTPs and updates the default browser beacons as appropriate.
   static DefaultState GetChromeDefaultStateFromPath(
       const base::FilePath& chrome_exe);
 
   // Returns the DefaultState of Chrome for |protocol|.
@@ skipping 219 matching lines @@
   // Set/CreateRegWorkItems and runs them using WorkItemList.
   static bool AddRegistryEntries(HKEY root,
                                  const ScopedVector<RegistryEntry>& entries);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellUtil);
 };
 
 
 #endif  // CHROME_INSTALLER_UTIL_SHELL_UTIL_H_