Keep only base/extractor.[cc|h].

service/build.scons

-# Copyright 2008-2009 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-# ========================================================================
-
-Import('env')
-
-# Create a local clone, so the parent environment is
-# unaffected by changes made here.
-local_env = env.Clone()
-
-local_env.Append(
-    CPPPATH = [
-        '$OBJ_ROOT',    # Needed for generated files.
-        ],
-)
-
-inputs = [
-    'service_main.cc',
-    ]
-
-# Build these into a library.
-local_env.ComponentLibrary('service', inputs)