Use local pages for webrtc telemetry tests.

tools/perf/page_sets/update_webrtc_cases

Index: tools/perf/page_sets/update_webrtc_cases
diff --git a/tools/perf/page_sets/update_webrtc_cases b/tools/perf/page_sets/update_webrtc_cases
new file mode 100755
index 0000000000000000000000000000000000000000..4bed428fb675994828f1618aee81d090738a2814
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+++ b/tools/perf/page_sets/update_webrtc_cases
@@ -0,0 +1,155 @@
+#!/usr/bin/env python
+# Copyright 2017 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.
+
+import argparse
+import os
+import re
+import shutil
+import subprocess
+import sys
+import tempfile
+import urllib2
+
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+DEFAULT_DESTINATION_DIR = os.path.join(SCRIPT_DIR, 'webrtc_cases')
+
+WEBRTC_GITHUB_URL = 'https://github.com/webrtc/'
+TEST_PAGES_LOCATION_BY_REPO = {
+    'test-pages': {
+        'dirs': [
+            'src/canvas-capture',
+            'src/multiple-peerconnections',
+        ],
+    },
+    'samples': {
+        'dirs': [
+            'src/content/datachannel/datatransfer',
+            'src/content/getusermedia/resolution',
+            'src/content/peerconnection/constraints',
+            'src/content/peerconnection/audio',
+        ],
+        'files': [
+            'src/js/common.js',
+        ],
+    },
+    'adapter': {
+        'files': [
+            'release/adapter.js',
+        ],
+    },
+}
+
+ADDED_SCRIPT_TAGS = (
+    '<script src="%s.js"></script>\n'
+    '<script src="adapter.js"></script>\n'
+    '<script src="common.js"></script>\n'
+    '</body></html>'
+)
+
+COPYRIGHT_NOTICE = [
+    'Copyright 2017 The Chromium Authors. All rights reserved.\n',
+    'Use of this source code is governed by a BSD-style license that can be\n',
+    'found in the LICENSE file.\n',
+]
+
+COPYRIGHT_NOTICE_LENGTH = 8
+JS_COPYRIGHT_NOTICE = ' * '.join(['/*\n'] + COPYRIGHT_NOTICE) + ' */\n'
+HTML_COPYRIGHT_NOTICE = ' * '.join(['<!--\n'] + COPYRIGHT_NOTICE) + '-->\n'
+
+STRIPPED_TAGS_RE = ('( *<meta.*?>\n?| *<link.*?>\n?|'
+                    ' *<script.*>.*?</script>\n?|</body>.*?</html>)')
+
+
+class TemporaryDirectory(object):
+  def __init__(self):
+    self._closed = False
+    self._name = None
+    self._name = tempfile.mkdtemp()
+  def __enter__(self):
+    return self._name
+  def __exit__(self, exc, value, tb):
+    if self._name and not self._closed:
+      shutil.rmtree(self._name)
+      self._closed = True
+
+
+def CopyJSFile(origin, destination, has_copyright=True):
+  contents = []
+  with open(origin) as input_file:
+    contents = input_file.readlines()
+
+  if has_copyright:
+    contents = contents[COPYRIGHT_NOTICE_LENGTH:]
+  contents = [JS_COPYRIGHT_NOTICE] + contents
+
+  with open(destination, 'w') as output_file:
+    output_file.writelines(contents)
+
+
+def CopyHTMLFile(test_name, origin, destination):
+  contents = ''
+  with open(origin) as input_file:
+    contents = input_file.read()
+
+  contents = re.sub(STRIPPED_TAGS_RE, '', contents,
+                    flags=re.MULTILINE|re.DOTALL)
+  contents += ADDED_SCRIPT_TAGS % test_name
+
+  contents = [line + '\n' for line in contents.split('\n')]
+  contents = (contents[:1] + [HTML_COPYRIGHT_NOTICE] +
+              contents[COPYRIGHT_NOTICE_LENGTH:])
+
+  with open(destination, 'w') as output_file:
+    output_file.writelines(contents)
+
+
+def main():
+  parser = argparse.ArgumentParser(
+      formatter_class=argparse.RawDescriptionHelpFormatter,
+      description=(
+          'Update the WebRTC test pages.\n'
+          'This script downloads the test pages from the WebRTC GitHub '
+          'repository and copies them to the DESTINATION directory after '
+          'processing them as follows: \n'
+          '  * Adds a copyright notice on top of the HTML and JS files.\n'
+          '  * Deletes the <meta> tags.\n'
+          '  * Discards the CSS files and corresponding link tags.\n'
+          '  * Discards the JS files and corresponding script tags except for '
+          'main.js, adapter.js and common.js.\n'
+          '  * Renames the index.html and main.js files for each test to '
+          'testname.html and testname.js.'))
+
+  parser.add_argument('-d', '--destination', default=DEFAULT_DESTINATION_DIR,
+                      type=str, help='Where to save the WebRTC test pages.')
+
+  args = parser.parse_args()
+
+  if not os.path.isdir(args.destination):
+    os.makedirs(args.destination)
+
+  with TemporaryDirectory() as temp_dir:
+    for repo_name, test_dirs in TEST_PAGES_LOCATION_BY_REPO.items():
+      p = subprocess.Popen(['git', 'clone', WEBRTC_GITHUB_URL + repo_name],
+                           cwd=temp_dir)
+      p.wait()
+
+      for test_dir in test_dirs.get('dirs', []):
+        test_dir = os.path.join(temp_dir, repo_name, test_dir)
+        test_name = os.path.basename(test_dir)
+
+        CopyJSFile(os.path.join(test_dir, 'js', 'main.js'),
+                   os.path.join(args.destination, test_name + '.js'))
+        CopyHTMLFile(test_name, os.path.join(test_dir, 'index.html'),
+                     os.path.join(args.destination, test_name + '.html'))
+
+      for test_file in test_dirs.get('files', []):
+        file_name = os.path.basename(test_file)
+        CopyJSFile(os.path.join(temp_dir, repo_name, test_file),
+                   os.path.join(args.destination, file_name), False)
+
+
+if __name__ == '__main__':
+  main()