Add external protocol dialog for Linux....

chrome/browser/external_protocol_handler.h

Index: chrome/browser/external_protocol_handler.h
===================================================================
--- chrome/browser/external_protocol_handler.h	(revision 25293)
+++ chrome/browser/external_protocol_handler.h	(working copy)
@@ -1,9 +1,9 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2009 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_EXTERNAL_PROTOCOL_HANDLER_H__
-#define CHROME_BROWSER_EXTERNAL_PROTOCOL_HANDLER_H__
+#ifndef CHROME_BROWSER_EXTERNAL_PROTOCOL_HANDLER_H_
+#define CHROME_BROWSER_EXTERNAL_PROTOCOL_HANDLER_H_
 
 #include <string>
 
@@ -33,6 +33,20 @@
   static void LaunchUrl(const GURL& url, int render_process_host_id,
                         int tab_contents_id);
 
+  // Creates and runs a External Protocol dialog box.
+  // |url| - The url of the request.
+  // |render_process_host_id| and |routing_id| are used by
+  // tab_util::GetTabContentsByID to aquire the tab contents associated with
+  // this dialog.
+  // NOTE: There is a race between the Time of Check and the Time Of Use for
+  //       the command line. Since the caller (web page) does not have access
+  //       to change the command line by itself, we do not do anything special
+  //       to protect against this scenario.
+  // This is implemented separately on each platform.
+  static void RunExternalProtocolDialog(const GURL& url,
+                                        int render_process_host_id,
+                                        int routing_id);
+
   // Register the ExcludedSchemes preference.
   static void RegisterPrefs(PrefService* prefs);
 
@@ -44,7 +58,7 @@
   // NOTE: You should Not call this function directly unless you are sure the
   // url you have has been checked against the blacklist, and has been escaped.
   // All calls to this function should originate in some way from LaunchUrl.
-  // Must run on the file thread.
+  // This will execute on the file thread.
   static void LaunchUrlWithoutSecurityCheck(const GURL& url);
 
   // Prepopulates the dictionary with known protocols to deny or allow, if
@@ -52,4 +66,4 @@
   static void PrepopulateDictionary(DictionaryValue* win_pref);
 };
 
-#endif  // CHROME_BROWSER_EXTERNAL_PROTOCOL_HANDLER_H__
+#endif  // CHROME_BROWSER_EXTERNAL_PROTOCOL_HANDLER_H_