Move ExtensionUnpacker into extensions:: namespace, rename it to Unpacker

chrome/chrome_tests.gypi

 # 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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1884 matching lines @@
         'common/extensions/extension_file_util_unittest.cc',
         'common/extensions/extension_icon_set_unittest.cc',
         'common/extensions/extension_l10n_util_unittest.cc',
         'common/extensions/extension_localization_peer_unittest.cc',
         'common/extensions/extension_message_bundle_unittest.cc',
         'common/extensions/extension_resource_unittest.cc',
         'common/extensions/extension_set_unittest.cc',
         'common/extensions/extension_test_util.h',
         'common/extensions/extension_test_util.cc',
         'common/extensions/extension_unittest.cc',
-        'common/extensions/extension_unpacker_unittest.cc',
         'common/extensions/features/feature_unittest.cc',
         'common/extensions/features/simple_feature_provider_unittest.cc',
         'common/extensions/manifest_tests/extension_manifest_test.cc',
         'common/extensions/manifest_tests/extension_manifests_auth_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_background_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_chromepermission_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_command_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_contentscript_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_default_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_devtools_unittest.cc',
@@ skipping 19 matching lines @@
         'common/extensions/manifest_tests/extension_manifests_tts_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_ui_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_update_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_validapp_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_web_unittest.cc',
         'common/extensions/matcher/substring_set_matcher_unittest.cc',
         'common/extensions/matcher/url_matcher_unittest.cc',
         'common/extensions/matcher/url_matcher_factory_unittest.cc',
         'common/extensions/manifest_unittest.cc',
         'common/extensions/permissions/permission_set_unittest.cc',
+        'common/extensions/unpacker_unittest.cc',
         'common/extensions/update_manifest_unittest.cc',
         'common/extensions/url_pattern_set_unittest.cc',
         'common/extensions/url_pattern_unittest.cc',
         'common/extensions/user_script_unittest.cc',
         'common/extensions/value_counter_unittest.cc',
         'common/extensions/api/extension_api_unittest.cc',
         'common/important_file_writer_unittest.cc',
         'common/json_pref_store_unittest.cc',
         'common/json_schema_validator_unittest.cc',
         'common/json_schema_validator_unittest_base.cc',
@@ skipping 2744 matching lines @@
             'input_jars_paths': [
               '<(PRODUCT_DIR)/lib.java/chromium_base.jar',
              ],
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],  # 'conditions'
 }