Gave native File Browser file handlers higher priority than 3rd party handlers.

chrome/browser/chromeos/extensions/file_manager_util.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/chromeos/extensions/file_manager_util.h"
 
 #include "base/bind.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
@@ skipping 348 matching lines @@
   Browser* browser = BrowserList::GetLastActive();
   if (!browser)
     return false;
 
   GURL url;
   if (!ConvertFileToFileSystemUrl(browser->profile(), full_path,
       GetFileBrowserExtensionUrl().GetOrigin(), &url))
     return false;
 
   const FileBrowserHandler* handler;
-  if (!file_handler_util::GetDefaultTask(browser->profile(), url, &handler))
+  if (!file_handler_util::GetDefaultTask(
+      browser->profile(), url, kFileBrowserDomain, &handler))
     return false;
 
   std::string extension_id = handler->extension_id();
   std::string action_id = handler->id();
   if (extension_id == kFileBrowserDomain) {
     // Only two of the built-in File Browser tasks require opening the File
     // Browser tab. Others just end up calling TryViewingFile.
     if (action_id == kFileBrowserGalleryTaskId ||
         action_id == kFileBrowserMountArchiveTaskId) {
       OpenFileBrowser(full_path);
@@ skipping 96 matching lines @@
     return false;
 
   PluginPrefs* plugin_prefs = PluginPrefs::GetForProfile(browser->profile());
   if (!plugin_prefs)
     return false;
 
   return plugin_prefs->IsPluginEnabled(plugin);
 }
 
 }  // namespace file_manager_util