Re-enable io2014 + add cds2014 tests for devenv.

ports/devenv/devenv_large_test.py

 #!/usr/bin/env python
 # Copyright (c) 2014 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 """Large tests of the devenv app."""
 
 import os
 import sys
 
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
 SRC_DIR = os.path.dirname(os.path.dirname(SCRIPT_DIR))
 sys.path.append(SRC_DIR)
 TOOLCHAIN = os.environ.get('TOOLCHAIN', 'newlib')
 DEVENV_OUT_DIR = os.path.join(SRC_DIR, 'out', 'publish', 'devenv', TOOLCHAIN)
 
 import chrome_test
 
 
 app = os.path.join(DEVENV_OUT_DIR, 'app')
 test_dir = os.path.join(SCRIPT_DIR, 'tests')
 
 chrome_test.main([
     '-C', test_dir,
     '-p', 'TOOLCHAIN=' + TOOLCHAIN,
-    '-t', '210',
+    '-t', '400',
     '--enable-nacl',
     '--load-extension', app,
     'devenv_large_test.html'] + sys.argv[1:])