graphics_WebGLConformance: use tarballs for WebGLConformance test

client/site_tests/graphics_WebGLConformance/graphics_WebGLConformance.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import logging, os, shutil
 from autotest_lib.client.bin import site_ui_test, utils
 from autotest_lib.client.common_lib import error, site_httpd, site_ui
 
 
 class graphics_WebGLConformance(site_ui_test.UITest):
     version = 1
 
 
     def initialize(self, creds = '$default'):
         self._test_url = 'http://localhost:8000/webgl-conformance-tests.html'
         self._testServer = site_httpd.HTTPListener(8000, docroot=self.srcdir)
         self._testServer.run()
         site_ui_test.UITest.initialize(self, creds)
 
 
-    def setup(self):
+    def setup(self, tarball='webgl-tests-0.0.1.tar.bz2'):
         shutil.rmtree(self.srcdir, ignore_errors=True)
+
+        dst_path = os.path.join(self.bindir, 'WebGL')
+        tarball_path = os.path.join(self.bindir, tarball)
+        if not os.path.exists(dst_path):
+            if not os.path.exists(tarball_path):
+                utils.get_file(
+                    'http://commondatastorage.googleapis.com/chromeos-localmirror/distfiles/' + tarball,
+                     tarball_path)
+            utils.extract_tarball_to_dir(tarball_path, dst_path)
+
         shutil.copytree(os.path.join(self.bindir, 'WebGL'), self.srcdir)
         os.chdir(self.srcdir)
         utils.system('patch -p1 < ../r11002.patch')
 
 
     def cleanup(self):
         self._testServer.stop()
         site_ui_test.UITest.cleanup(self)
 
 
     def run_once(self, timeout=300):
         latch = self._testServer.add_wait_url('/WebGL/results')
         session = site_ui.ChromeSession(' --enable-webgl %s' % self._test_url)
         logging.debug('Chrome session started.')
         latch.wait(timeout)
         session.close()
 
         if not latch.is_set():
             raise error.TestFail('Never received callback from browser.')
         results = self._testServer.get_form_entries()
         total = int(results['total'])
         passed = int(results['pass'])
         if passed < total:
             raise error.TestFail('Results: %d out of %d tests failed!' %
                                  (total - passed, total))