[chromedriver] Enable a java test and fix binary path like "~/chrome".

chrome/test/chromedriver/util.py

 # 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.
 
 """Generic utilities for all python scripts."""
 
 import atexit
 import httplib
 import os
 import signal
@@ skipping 21 matching lines @@
 
 
 def IsLinux():
   return sys.platform.startswith('linux')
 
 
 def IsMac():
   return sys.platform.startswith('darwin')
 
 
+def GetAbsolutePathOfUserPath(user_path):
+  """Expand the given |user_path| (like "~/file") and return its absolute path.
+  """
+  if not user_path:

[craigdh, 2014/01/29 18:47:35]

The empty string will cause this to return None. It probably makes more sense to
do "if user_path is None:"?

[stgao, 2014/01/29 19:40:27]

Nice catch.
Done.

+    return None
+  return os.path.abspath(os.path.expanduser(user_path))
+
+
 def _DeleteDir(path):
   """Deletes a directory recursively, which must exist."""
   # Don't use shutil.rmtree because it can't delete read-only files on Win.
   for root, dirs, files in os.walk(path, topdown=False):
     for name in files:
       filename = os.path.join(root, name)
       os.chmod(filename, stat.S_IWRITE)
       os.remove(filename)
     for name in dirs:
       os.rmdir(os.path.join(root, name))
@@ skipping 132 matching lines @@
 
 
 def AddLink(label, url):
   """Adds a link with name |label| linking to |url| to current buildbot step.
 
   Args:
     label: A string with the name of the label.
     url: A string of the URL.
   """
   print '@@@STEP_LINK@%s@%s@@@' % (label, url)