Revert 166085 - Selective build clobbering feature (landmines.py and android build scripts).

build/gyp_helper.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.
-
-# This file helps gyp_chromium and landmines correctly set up the gyp
-# environment from chromium.gyp_env on disk
-
-import os
-
-SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
-CHROME_SRC = os.path.dirname(SCRIPT_DIR)
-
-
-def apply_gyp_environment_from_file(file_path):
-  """Reads in a *.gyp_env file and applies the valid keys to os.environ."""
-  if not os.path.exists(file_path):
-    return
-  with open(file_path) as f:
-    file_contents = f.read()
-  try:
-    file_data = eval(file_contents, {'__builtins__': None}, None)
-  except SyntaxError, e:
-    e.filename = os.path.abspath(file_path)
-    raise
-  supported_vars = ( 'CC',
-                     'CHROMIUM_GYP_FILE',
-                     'CHROMIUM_GYP_SYNTAX_CHECK',
-                     'CXX',
-                     'GYP_DEFINES',
-                     'GYP_GENERATOR_FLAGS',
-                     'GYP_GENERATOR_OUTPUT',
-                     'GYP_GENERATORS', )
-  for var in supported_vars:
-    file_val = file_data.get(var)
-    if file_val:
-      if var in os.environ:
-        print 'INFO: Environment value for "%s" overrides value in %s.' % (
-            var, os.path.abspath(file_path)
-        )
-      else:
-        os.environ[var] = file_val
-
-
-def apply_chromium_gyp_env():
-  if 'SKIP_CHROMIUM_GYP_ENV' not in os.environ:
-    # Update the environment based on chromium.gyp_env
-    path = os.path.join(os.path.dirname(CHROME_SRC), 'chromium.gyp_env')
-    apply_gyp_environment_from_file(path)