Remove unused clobber option from compile.py

scripts/slave/compile.py

 #!/usr/bin/env python
 # 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.
 
 """A tool to build chrome, executed by buildbot.
 
   When this is run, the current directory (cwd) should be the outer build
   directory (e.g., chrome-release/build/).
 
@@ skipping 388 matching lines @@
 
     # HACK(yyanagisawa): update environment files on |env| update.
     # For compiling on Windows, environment in environment files are used.
     # It means even if enviroment such as GOMA_DISABLED is updated in
     # compile.py, the update will be ignored.
     # We need to update environment files to reflect the update.
     if chromium_utils.IsWindows() and NeedEnvFileUpdateOnWin(env):
       print 'Updating environment.{x86,x64} files.'
       UpdateWindowsEnvironment(options.target_output_dir, env)
 
-    if options.clobber:
-      print 'Removing %s' % options.target_output_dir
-      # Deleting output_dir would also delete all the .ninja files necessary to
-      # build. Clobbering should run before runhooks (which creates .ninja
-      # files). For now, only delete all non-.ninja files.
-      # TODO(thakis): Make "clobber" a step that runs before "runhooks".
-      # Once the master has been restarted, remove all clobber handling
-      # from compile.py, https://crbug.com/574557
-      build_directory.RmtreeExceptNinjaOrGomaFiles(options.target_output_dir)
-
     command.extend(options.build_args)
     command.extend(args)
 
     maybe_set_official_build_envvars(options, env)
 
     if options.compiler:
       print 'using', options.compiler
 
     if options.compiler in ('goma', 'goma-clang'):
       assert options.goma_dir
@@ skipping 36 matching lines @@
     outdir = 'out_%s' % (options.cros_board,)
   elif options.out_dir:
     outdir = options.out_dir
   else:
     outdir = 'out'
   return os.path.abspath(os.path.join(options.src_dir, outdir, options.target))
 
 
 def get_parsed_options():
   option_parser = optparse.OptionParser()
-  option_parser.add_option('--clobber', action='store_true', default=False,
-                           help='delete the output directory before compiling')
   option_parser.add_option('--target', default='Release',
                            help='build target (Debug or Release)')
   option_parser.add_option('--src-dir', default=None,
                            help='path to the root of the source tree')
   option_parser.add_option('--mode', default='dev',
                            help='build mode (dev or official) controlling '
                                 'environment variables set during build')
   # TODO(thakis): Remove this, https://crbug.com/622768
   option_parser.add_option('--build-tool', default=None, help='ignored')
   option_parser.add_option('--build-args', action='append', default=[],
@@ skipping 86 matching lines @@
   exit_status = main_ninja(options, args, env)
 
   # stop goma
   goma_teardown(options, env, exit_status, goma_cloudtail)
 
   return exit_status
 
 
 if '__main__' == __name__:
   sys.exit(real_main())