Links in platform apps should open in the system default browser.

chrome/browser/shell_integration_linux.cc

 // 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.
 
 #include "chrome/browser/shell_integration_linux.h"
 
 #include <fcntl.h>
 #include <glib.h>
 #include <stdlib.h>
 #include <sys/stat.h>
@@ skipping 670 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 
   FilePath shortcut_filename = GetExtensionShortcutFilename(
       profile_path, extension_id);
   DCHECK(!shortcut_filename.empty());
 
   DeleteShortcutOnDesktop(shortcut_filename);
   DeleteShortcutInApplicationsMenu(shortcut_filename);
 }
 
+void LaunchDefaultBrowser(const GURL& url) {

[Mihai Parparita -not on Chrome, 2012/09/04 21:39:53]

This is already implemented (for all platforms) by platform_util::OpenExternal

+  std::vector<std::string> argv;
+  argv.push_back("xdg-open");
+  argv.push_back(url.spec().c_str());
+
+  int exit_code;
+  LaunchXdgUtility(argv, &exit_code);
+}
+
 }  // namespace ShellIntegrationLinux