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

chrome/browser/chromeos/extensions/file_browser_private_api.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_browser_private_api.h"
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 540 matching lines @@
     // We need case-insensitive matching, and pattern in handler is already
     // in lower case.
     StringToLowerASCII(&file_url);
     file_urls.push_back(GURL(file_url));
   }
 
   ListValue* result_list = new ListValue();
   result_.reset(result_list);
 
   file_handler_util::LastUsedHandlerList common_tasks;
-  if (!file_handler_util::FindCommonTasks(profile_, file_urls, &common_tasks))
+  if (!file_handler_util::FindCommonTasks(
+      profile_,
+      file_urls,
+      kFileBrowserDomain,
+      &common_tasks))
     return false;
 
   ExtensionService* service = profile_->GetExtensionService();
   for (file_handler_util::LastUsedHandlerList::const_iterator iter =
            common_tasks.begin();
        iter != common_tasks.end();
        ++iter) {
     const FileBrowserHandler* handler = iter->handler;
     const std::string extension_id = handler->extension_id();
     const Extension* extension = service->GetExtensionById(extension_id, false);
@@ skipping 1134 matching lines @@
     local_paths_->Append(Value::CreateStringValue(""));
     DVLOG(1) << "Failed to get " << gdata_path.value()
              << " with error code: " << error;
   }
 
   remaining_gdata_paths_.pop();
 
   // Start getting the next file.
   GetFileOrSendResponse();
 }