[Chromoting] Let the Linux start-host app take a redirect-URL parameter.

remoting/host/setup/oauth_helper.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 REMOTING_HOST_SETUP_OAUTH_HELPER_H
 #define REMOTING_HOST_SETUP_OAUTH_HELPER_H
 
 #include <string>
 
 namespace remoting {
 
 // Gets the OAuth scope of the host's refresh token.
 std::string GetOauthScope();
 
+// Gets the default redirect URL for the OAuth dance.
+std::string GetDefaultOauthRedirectUrl();
+
 // Gets a URL at which the OAuth dance starts.
-std::string GetOauthStartUrl();
-
-// Gets a redirect URL for the OAuth dance.
-std::string GetOauthRedirectUrl();
+std::string GetOauthStartUrl(const std::string& redirect_url);
 
 // Returns the OAuth authorization code embedded in a URL, or the empty string
 // if there is no such code.
 // To get an OAuth authorization code, (i) start a browser, (ii) navigate it
 // to |GetOauthStartUrl()|, (iii) ask the user to sign on to their account,
 // and grant the requested permissions, (iv) monitor the URLs that the browser
 // shows, passing each one to |GetOauthCodeInUrl()|, until that function returns
 // a non-empty string. That string is the authorization code.
-std::string GetOauthCodeInUrl(const std::string& url);
+std::string GetOauthCodeInUrl(const std::string& url,
+                              const std::string& redirect_url);
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_SETUP_OAUTH_HELPER_H