Access environment variables through Host object instead of directly.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/android.py

 # Copyright (C) 2012 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 843 matching lines @@
         self._android_commands.run(['shell', 'echo', '0', '>', KPTR_RESTRICT_PATH])
 
         _log.debug("Updating kallsyms file (%s) from device" % kallsyms_cache_path)
         self._android_commands.pull("/proc/kallsyms", kallsyms_cache_path)
 
         self._android_commands.run(['shell', 'echo', saved_kptr_restrict, '>', KPTR_RESTRICT_PATH])
 
         return kallsyms_cache_path
 
     def _find_or_create_symfs(self):
-        environment = self._port.host.copy_current_environment()
-        env = environment.to_dictionary()
+        env = self._port.host.environ.copy()
         fs = self._port.host.filesystem
 
         if 'ANDROID_SYMFS' in env:
             symfs_path = env['ANDROID_SYMFS']
         else:
             symfs_path = fs.join(self._port.results_directory(), 'symfs')
             _log.debug("ANDROID_SYMFS not set, using %s" % symfs_path)
 
         # find the installed path, and the path of the symboled built library
         # FIXME: We should get the install path from the device!
@@ skipping 430 matching lines @@
         return command
 
     def _read_prompt(self, deadline):
         last_char = ''
         while True:
             current_char = self._server_process.read_stdout(deadline, 1)
             if current_char == ' ':
                 if last_char in ('#', '$'):
                     return
             last_char = current_char