Revert part of r1213 that's causing failures on Mac.

pylib/gyp/generator/ninja.py

 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import copy
 import gyp
 import gyp.common
 import gyp.msvs_emulation
 import gyp.system_test
 import gyp.xcode_emulation
@@ skipping 196 matching lines @@
         path = path.replace(PRODUCT_DIR, '.')
 
     INTERMEDIATE_DIR = '$!INTERMEDIATE_DIR'
     if INTERMEDIATE_DIR in path:
       int_dir = self.GypPathToUniqueOutput('gen')
       # GypPathToUniqueOutput generates a path relative to the product dir,
       # so insert product_dir in front if it is provided.
       path = path.replace(INTERMEDIATE_DIR,
                           os.path.join(product_dir or '', int_dir))
 
-    return os.path.normpath(path)
+    return path
 
   def ExpandRuleVariables(self, path, root, dirname, source, ext, name):
     path = path.replace(generator_default_variables['RULE_INPUT_ROOT'], root)
     path = path.replace(generator_default_variables['RULE_INPUT_DIRNAME'],
                         dirname)
     path = path.replace(generator_default_variables['RULE_INPUT_PATH'], source)
     path = path.replace(generator_default_variables['RULE_INPUT_EXT'], ext)
     path = path.replace(generator_default_variables['RULE_INPUT_NAME'], name)
     return path
 
@@ skipping 1024 matching lines @@
 
   user_config = params.get('generator_flags', {}).get('config', None)
   if user_config:
     GenerateOutputForConfig(target_list, target_dicts, data, params,
                             user_config)
   else:
     config_names = target_dicts[target_list[0]]['configurations'].keys()
     for config_name in config_names:
       GenerateOutputForConfig(target_list, target_dicts, data, params,
                               config_name)