linux_aura: Port the linux first run dialog to aura.

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 321 matching lines @@
 // tweaked the script, but still allows our copy to be used if the script on the
 // system fails, as the system copy may be missing capabilities of the Chrome
 // copy.
 
 // If |protocol| is empty this function sets Chrome as the default browser,
 // otherwise it sets Chrome as the default handler application for |protocol|.
 bool SetDefaultWebClient(const std::string& protocol) {
 #if defined(OS_CHROMEOS)
   return true;
 #else
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-
   scoped_ptr<base::Environment> env(base::Environment::Create());
 
   std::vector<std::string> argv;
   argv.push_back(kXdgSettings);
   argv.push_back("set");
   if (protocol.empty()) {
     argv.push_back(kXdgSettingsDefaultBrowser);
   } else {
     argv.push_back(kXdgSettingsDefaultSchemeHandler);
     argv.push_back(protocol);
@@ skipping 614 matching lines @@
     for (std::vector<base::FilePath>::const_iterator it =
          shortcut_filenames_app_menu.begin();
          it != shortcut_filenames_app_menu.end(); ++it) {
       DeleteShortcutInApplicationsMenu(*it,
                                        base::FilePath(kDirectoryFilename));
     }
   }
 }
 
 }  // namespace ShellIntegrationLinux