[Android] Prepare build/android/ for catapult+devil.

build/android/gyp/java_google_api_keys.py

 #!/usr/bin/env python
 #
 # Copyright 2015 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.
 
 # Generates a Java file with API keys.
 
 import argparse
 import os
 import string
 import sys
 import zipfile
 
 from util import build_utils
 
 sys.path.append(
     os.path.abspath(os.path.join(sys.path[0], '../../../google_apis')))
 import google_api_keys
 
 sys.path.append(os.path.abspath(os.path.join(
     os.path.dirname(__file__), os.pardir)))
-from pylib import constants
+from pylib.constants import host_paths
 
 
 PACKAGE = 'org.chromium.chrome'
 CLASSNAME = 'GoogleAPIKeys'
 
 
 def GetScriptName():
-  return os.path.relpath(__file__, constants.DIR_SOURCE_ROOT)
+  return os.path.relpath(__file__, host_paths.DIR_SOURCE_ROOT)
 
 
 def GenerateOutput(constant_definitions):
   template = string.Template("""
 // Copyright 2015 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 is autogenerated by
 //     ${SCRIPT_NAME}
@@ skipping 78 matching lines @@
 
   if options.out:
     _DoWriteJavaOutput(options.out, values)
   if options.srcjar:
     _DoWriteJarOutput(options.srcjar, values)
 
 
 if __name__ == '__main__':
   _DoMain(sys.argv[1:])