recipes: Stop passing --build-tool=ninja to compile.py

scripts/slave/recipe_modules/chromium/api.py

 # Copyright 2013 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.
 
 import re
 
 from recipe_engine import recipe_api
 from recipe_engine import util as recipe_util
 
 class TestLauncherFilterFileInputPlaceholder(recipe_util.InputPlaceholder):
@@ skipping 167 matching lines @@
 
     # Use explicit goma deps cache dir if it's set in the path config.
     # Otherwise use the default one inside build output directory.
     try:
       args.extend(['--goma-deps-cache-dir', self.m.path['goma_deps_cache']])
     except KeyError:
       pass
 
     if self.c.compile_py.build_args:
       args += ['--build-args', self.c.compile_py.build_args]
-    # TODO(thakis): Stop passing --build-tool, there is just one.
-    args += ['--build-tool', 'ninja']
     if self.m.properties.get('build_data_dir'):
       args += ['--build-data-dir', self.m.properties.get('build_data_dir')]
     if self.c.compile_py.compiler:
       args += ['--compiler', self.c.compile_py.compiler]
       if 'goma' in self.c.compile_py.compiler:
         args += [
             '--goma-jsonstatus', self.m.json.output(),
             '--goma-service-account-json-file',
             self.m.goma.service_account_json_path,
         ]
@@ skipping 573 matching lines @@
       }))
 
   def get_annotate_by_test_name(self, test_name):
     return 'graphing'
 
   def download_lto_plugin(self):
     return self.m.python(
         name='download LTO plugin',
         script=self.m.path['checkout'].join(
             'build', 'download_gold_plugin.py'))