Fix errors in xvfb.py and run_test_from_archive.py

tools/isolate/run_test_from_archive.py

 #!/usr/bin/env python
 # 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.
 
 """Reads a manifest, creates a tree of hardlinks and runs the test.
 
 Keeps a local cache.
 """
 
@@ skipping 636 matching lines @@
   def fetch_files(self, cache, files):
     """Adds files in this manifest not present in files dictionary.
 
     Preemptively request files.
 
     Note that |files| is modified by this function.
     """
     assert self.can_fetch
     if not self._manifest_parsed or self.files_fetched:
       return
-    logging.info('fetch_files(%s)' % self.obj_hash)
+    logging.debug('fetch_files(%s)' % self.obj_hash)
     for filepath, properties in self.data.get('files', {}).iteritems():
       # Root manifest has priority on the files being mapped. In particular,
       # overriden files must not be fetched.
       if filepath not in files:
         files[filepath] = properties
         if 'sha-1' in properties:
           # Preemptively request files.
-          logging.info('fetching %s' % filepath)
+          logging.debug('fetching %s' % filepath)
           cache.retrieve(Remote.MED, properties['sha-1'])
     self.files_fetched = True
 
 
 class Settings(object):
   """Results of a completely parsed manifest."""
   def __init__(self):
     self.command = []
     self.files = {}
     self.read_only = None
@@ skipping 95 matching lines @@
         settings.load(cache, manifest_hash)
 
       if not settings.command:
         print >> sys.stderr, 'No command to run'
         return 1
 
       with Profiler('GetRest') as _prof:
         logging.debug('Creating directories')
         # Creates the tree of directories to create.
         directories = set(os.path.dirname(f) for f in settings.files)
-        for item in directories:
-          directories.add(os.path.dirname(item))
+        for item in list(directories):
+          while item:
+            directories.add(item)
+            item = os.path.dirname(item)
         for d in sorted(directories):
           if d:
             os.mkdir(os.path.join(outdir, d))
 
         # Creates the links if necessary.
         for filepath, properties in settings.files.iteritems():
           if 'link' not in properties:
             continue
           outfile = os.path.join(outdir, filepath)
           os.symlink(properties['link'], outfile)
@@ skipping 108 matching lines @@
         os.path.abspath(options.cache),
         options.remote,
         policies)
   except (ConfigError, MappingError), e:
     print >> sys.stderr, str(e)
     return 1
 
 
 if __name__ == '__main__':
   sys.exit(main())