Fix the YCM tests on Mac.

tools/vim/ninja_output.py

 # Copyright 2014 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 sys
 import os
 import exceptions
 import itertools
 import re
@@ skipping 19 matching lines @@
   if not output_dirs:
     generator_flags = os.getenv('GYP_GENERATOR_FLAGS', '').split(' ')
     for flag in generator_flags:
       name_value = flag.split('=', 1)
       if (len(name_value) == 2 and name_value[0] == 'output_dir' and
           os.path.isdir(os.path.join(chrome_root, name_value[1]))):
         output_dirs = [name_value[1]]
   if not output_dirs:
     for f in os.listdir(chrome_root):
       if re.match(r'out(\b|_)', f):
-        out = os.path.realpath(os.path.join(chrome_root, f))
-        if os.path.isdir(out):
-          output_dirs.append(os.path.relpath(out, start = chrome_root))
+        if os.path.isdir(os.path.join(chrome_root, f)):
+          output_dirs.append(f)
 
   def generate_paths():
     for out_dir in output_dirs:
       out_path = os.path.join(chrome_root, out_dir)
       for config in os.listdir(out_path):
         path = os.path.join(out_path, config)
         if os.path.exists(os.path.join(path, 'build.ninja')):
           yield path
 
   def approx_directory_mtime(path):
     # This is a heuristic; don't recurse into subdirectories.
     paths = [path] + [os.path.join(path, f) for f in os.listdir(path)]
     return max(os.path.getmtime(p) for p in paths)
 
   try:
     return max(generate_paths(), key=approx_directory_mtime)
   except ValueError:
     raise exceptions.RuntimeError(
       'Unable to find a valid ninja output directory.')
 
 if __name__ == '__main__':
   if len(sys.argv) != 2:
     raise exceptions.RuntimeError('Expected a single path argument.')
   print GetNinjaOutputDirectory(sys.argv[1])