Fix registerProtocolHandler OS registration on Windows 8

chrome/browser/shell_integration.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.
 
 #ifndef CHROME_BROWSER_SHELL_INTEGRATION_H_
 #define CHROME_BROWSER_SHELL_INTEGRATION_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 15 matching lines @@
   // Chrome as the default browser. 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.
   static bool SetAsDefaultBrowserInteractive();
 
   // Sets Chrome as the default client application for the given protocol
   // (only for the current user). Returns false if this operation fails.
   static bool SetAsDefaultProtocolClient(const std::string& protocol);
 
+  // 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.
+  static bool SetAsDefaultProtocolClientInteractive(
+      const std::string& protocol);
+
   // In Windows 8 a browser can be made default-in-metro only in an interactive
   // flow. We will distinguish between two types of permissions here to avoid
   // forcing the user into UI interaction when this should not be done.
   enum DefaultWebClientSetPermission {
     SET_DEFAULT_NOT_ALLOWED = 0,
     SET_DEFAULT_UNATTENDED,
     SET_DEFAULT_INTERACTIVE,
   };
 
   // Returns requirements for making the running browser the user's default.
@@ skipping 240 matching lines @@
     // Set Chrome as the default handler for this protocol.
     virtual bool SetAsDefault(bool interactive_permitted) OVERRIDE;
 
     std::string protocol_;
 
     DISALLOW_COPY_AND_ASSIGN(DefaultProtocolClientWorker);
   };
 };
 
 #endif  // CHROME_BROWSER_SHELL_INTEGRATION_H_