Allow extension APIs to be compiled out.

chrome/chrome_browser_extensions.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.
 
 {
   'targets': [
     {
       'target_name': 'browser_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 477 matching lines @@
             '../build/linux/system.gyp:dbus-glib',
             '../third_party/libevent/libevent.gyp:libevent',
             '../third_party/mozc/chrome/chromeos/renderer/chromeos_renderer.gyp:mozc_candidates_proto',
             'browser/chromeos/input_method/input_method.gyp:gencode',
           ],
           'sources!': [
             'browser/extensions/default_apps.cc',
             'browser/extensions/default_apps.h',
           ],
         }],
+        ['enable_extensions==0', {

[Aaron Boodman, 2012/04/11 06:36:40]

Is it possible to only include these files in the first place if
enable_extensions=1? I find the exclude pattern very
spooky-action-at-a-distance.

[Jesse Greenwald, 2012/04/11 19:11:57]

Can you clarify?  Are you talking about the top list of excludes here and/or the
bottom list of excluding things from browser/extensions/api?

+          'sources/': [
+            ['exclude', '^browser/accessibility/accessibility_extension_api.cc'],
+            ['exclude', '^browser/bookmarks/bookmark_extension_api.cc'],
+            ['exclude', '^browser/bookmarks/bookmark_manager_extension_api.cc'],
+            ['exclude', '^browser/chromeos/extensions/file_browser_private_api.cc'],
+            ['exclude', '^browser/chromeos/extensions/offers_private_api.cc'],
+            ['exclude', '^browser/chromeos/media/media_player_extension_api.cc'],
+            ['exclude', '^browser/download/download_extension_api.cc'],
+            ['exclude', '^browser/download/download_extension_api.cc'],
+            ['exclude', '^browser/extensions/execute_code_in_tab_function.cc'],
+            ['exclude', '^browser/extensions/extension_chrome_auth_private_api.cc'],
+            ['exclude', '^browser/extensions/extension_content_settings_api.cc'],
+            ['exclude', '^browser/extensions/extension_context_menu_api.cc'],
+            ['exclude', '^browser/extensions/extension_cookies_api.cc'],
+            ['exclude', '^browser/extensions/extension_debugger_api.cc'],
+            ['exclude', '^browser/extensions/extension_font_settings_api.cc'],
+            ['exclude', '^browser/extensions/extension_i18n_api.cc'],
+            ['exclude', '^browser/extensions/extension_idle_api.cc'],
+            ['exclude', '^browser/extensions/extension_input_api.cc'],
+            ['exclude', '^browser/extensions/extension_input_ime_api.cc'],
+            ['exclude', '^browser/extensions/extension_input_method_api.cc'],
+            ['exclude', '^browser/extensions/extension_input_ui_api.cc'],
+            ['exclude', '^browser/extensions/extension_managed_mode_api.cc'],
+            ['exclude', '^browser/extensions/extension_management_api.cc'],
+            ['exclude', '^browser/extensions/extension_metrics_module.cc'],
+            ['exclude', '^browser/extensions/extension_page_capture_api.cc'],
+            ['exclude', '^browser/extensions/extension_preference_api.cc'],
+            ['exclude', '^browser/extensions/extension_tabs_module.cc'],
+            ['exclude', '^browser/extensions/extension_test_api.cc'],
+            ['exclude', '^browser/extensions/extension_web_socket_proxy_private_api.cc'],
+            ['exclude', '^browser/extensions/extension_webstore_private_api.cc'],
+            ['exclude', '^browser/extensions/settings/settings_api.cc'],
+            ['exclude', '^browser/extensions/system/system_api.cc'],
+            ['exclude', '^browser/history/history_extension_api.cc'],
+            ['exclude', '^browser/history/top_sites_extension_api.cc'],
+            ['exclude', '^browser/infobars/infobar_extension_api.cc'],
+            ['exclude', '^browser/rlz/rlz_extension_api.cc'],
+            ['exclude', '^browser/speech/extension_api/tts_engine_extension_api.cc'],
+            ['exclude', '^browser/speech/extension_api/tts_extension_api.cc'],
+            ['exclude', '^browser/speech/speech_input_extension_api.cc'],
+
+            # Handle files in browser/extensions/api. Exclude everything by default, white list
+            # files if they are needed for linking.
+            # TODO: The re-includes should go away or shrink as extensions are refactored to be
+            # less intertwined in the main codebase.
+            ['exclude', '^browser/extensions/api/'],
+            ['include', '^browser/extensions/api/declarative/initializing_rules_registry.cc'],
+            ['include', '^browser/extensions/api/declarative/rules_registry.cc'],
+            ['include', '^browser/extensions/api/declarative/rules_registry_service.cc'],
+            ['include', '^browser/extensions/api/declarative/rules_registry_with_cache.cc'],
+            ['include', '^browser/extensions/api/declarative/substring_set_matcher.cc'],
+            ['include', '^browser/extensions/api/declarative/url_matcher.cc'],
+            ['include', '^browser/extensions/api/declarative_webrequest/webrequest_action.cc'],
+            ['include', '^browser/extensions/api/declarative_webrequest/webrequest_condition.cc'],
+            ['include', '^browser/extensions/api/declarative_webrequest/webrequest_condition_attribute.cc'],
+            ['include', '^browser/extensions/api/declarative_webrequest/webrequest_constants.cc'],
+            ['include', '^browser/extensions/api/declarative_webrequest/webrequest_rule.cc'],
+            ['include', '^browser/extensions/api/declarative_webrequest/webrequest_rules_registry.cc'],
+            ['include', '^browser/extensions/api/permissions/permissions_api.cc'],
+            ['include', '^browser/extensions/api/permissions/permissions_api_helpers.cc'],
+            ['include', '^browser/extensions/api/proxy/proxy_api.cc'],
+            ['include', '^browser/extensions/api/proxy/proxy_api_constants.cc'],
+            ['include', '^browser/extensions/api/runtime/runtime_api.cc'],
+            ['include', '^browser/extensions/api/web_navigation/web_navigation_api.cc'],
+            ['include', '^browser/extensions/api/web_navigation/web_navigation_api_constants.cc'],
+            ['include', '^browser/extensions/api/web_request/web_request_api.cc'],
+            ['include', '^browser/extensions/api/web_request/web_request_api_constants.cc'],
+            ['include', '^browser/extensions/api/web_request/web_request_api_helpers.cc'],
+            ['include', '^browser/extensions/api/web_request/web_request_time_tracker.cc'],
+          ],
+        }],
         ['use_virtual_keyboard==0', {
           'sources/': [
             ['exclude', '^browser/extensions/extension_input_ui_api.*'],
           ],
         }],
         ['OS=="linux" and use_aura==1', {
           'dependencies': [
             '../build/linux/system.gyp:dbus',
             '../build/linux/system.gyp:fontconfig',
             '../build/linux/system.gyp:x11',
@@ skipping 80 matching lines @@
                 }],
               ],
             }],
           ],
         }],
       ],
     },
   ],
 }