Only build extensions code in chrome/browser/ui when extensions are enabled.

chrome/chrome_browser_ui.gypi

 # Copyright 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': {
     'chrome_browser_ui_non_ios_sources': [
       'browser/ui/accelerator_utils.h',
       'browser/ui/android/android_about_app_info.cc',
       'browser/ui/android/android_about_app_info.h',
@@ skipping 745 matching lines @@
       'browser/ui/cocoa/wrench_menu/menu_tracked_root_view.h',
       'browser/ui/cocoa/wrench_menu/menu_tracked_root_view.mm',
       'browser/ui/cocoa/wrench_menu/recent_tabs_menu_model_delegate.h',
       'browser/ui/cocoa/wrench_menu/recent_tabs_menu_model_delegate.mm',
       'browser/ui/cocoa/wrench_menu/wrench_menu_button_cell.h',
       'browser/ui/cocoa/wrench_menu/wrench_menu_button_cell.mm',
       'browser/ui/cocoa/wrench_menu/wrench_menu_controller.h',
       'browser/ui/cocoa/wrench_menu/wrench_menu_controller.mm',
       'browser/ui/confirm_bubble.h',
       'browser/ui/crypto_module_password_dialog.h',
-      'browser/ui/extensions/accelerator_priority.cc',
-      'browser/ui/extensions/accelerator_priority.h',
-      'browser/ui/extensions/extension_installed_bubble.cc',
-      'browser/ui/extensions/extension_installed_bubble.h',
-      'browser/ui/extensions/extension_enable_flow.cc',
-      'browser/ui/extensions/extension_enable_flow.h',
-      'browser/ui/extensions/extension_enable_flow_delegate.h',
       'browser/ui/find_bar/find_bar.h',
       'browser/ui/find_bar/find_bar_state.h',
       'browser/ui/find_bar/find_bar_state_factory.cc',
       'browser/ui/find_bar/find_bar_state_factory.h',
       'browser/ui/find_bar/find_notification_details.h',
       'browser/ui/find_bar/find_tab_helper.cc',
       'browser/ui/find_bar/find_tab_helper.h',
       'browser/ui/fullscreen/fullscreen_exit_bubble.cc',
       'browser/ui/fullscreen/fullscreen_exit_bubble.h',
       'browser/ui/fullscreen/fullscreen_within_tab_helper.cc',
@@ skipping 260 matching lines @@
       'browser/ui/webui/constrained_web_dialog_ui.cc',
       'browser/ui/webui/constrained_web_dialog_ui.h',
       'browser/ui/webui/cookies_tree_model_util.cc',
       'browser/ui/webui/cookies_tree_model_util.h',
       'browser/ui/webui/crashes_ui.cc',
       'browser/ui/webui/crashes_ui.h',
       'browser/ui/webui/devtools_ui.cc',
       'browser/ui/webui/devtools_ui.h',
       'browser/ui/webui/domain_reliability_internals_ui.cc',
       'browser/ui/webui/domain_reliability_internals_ui.h',
-      'browser/ui/webui/extensions/chromeos/kiosk_apps_handler.cc',
-      'browser/ui/webui/extensions/chromeos/kiosk_apps_handler.h',
-      'browser/ui/webui/extensions/extension_basic_info.cc',
-      'browser/ui/webui/extensions/extension_basic_info.h',
-      'browser/ui/webui/extensions/extension_error_ui_util.cc',
-      'browser/ui/webui/extensions/extension_error_ui_util.h',
-      'browser/ui/webui/extensions/extension_icon_source.cc',
-      'browser/ui/webui/extensions/extension_icon_source.h',
-      'browser/ui/webui/extensions/extension_info_ui.cc',
-      'browser/ui/webui/extensions/extension_info_ui.h',
-      'browser/ui/webui/extensions/pack_extension_handler.cc',
-      'browser/ui/webui/extensions/pack_extension_handler.h',
       'browser/ui/webui/favicon_source.cc',
       'browser/ui/webui/favicon_source.h',
       'browser/ui/webui/fileicon_source.cc',
       'browser/ui/webui/fileicon_source.h',
       'browser/ui/webui/flags_ui.cc',
       'browser/ui/webui/flags_ui.h',
       'browser/ui/webui/flash_ui.cc',
       'browser/ui/webui/flash_ui.h',
       'browser/ui/webui/gcm_internals_ui.cc',
       'browser/ui/webui/gcm_internals_ui.h',
@@ skipping 1444 matching lines @@
       'browser/ui/views/javascript_app_modal_event_blocker_x11.cc',
       'browser/ui/views/javascript_app_modal_event_blocker_x11.h',
       'browser/ui/views/tabs/window_finder_x11.cc',
     ],
     # Files used on iOS. iOS uses only these files and does not share other
     # lists, so a file may appear here and in the non_ios_sources also.
     'chrome_browser_ui_ios_sources': [
       'browser/ui/profile_error_dialog.cc',
       'browser/ui/profile_error_dialog.h',
     ],
+    'chrome_browser_ui_extensions_sources': [
+      'browser/ui/extensions/accelerator_priority.cc',
+      'browser/ui/extensions/accelerator_priority.h',
+      'browser/ui/extensions/extension_installed_bubble.cc',
+      'browser/ui/extensions/extension_installed_bubble.h',
+      'browser/ui/extensions/extension_enable_flow.cc',
+      'browser/ui/extensions/extension_enable_flow.h',
+      'browser/ui/extensions/extension_enable_flow_delegate.h',
+      'browser/ui/webui/extensions/chromeos/kiosk_apps_handler.cc',
+      'browser/ui/webui/extensions/chromeos/kiosk_apps_handler.h',
+      'browser/ui/webui/extensions/extension_basic_info.cc',
+      'browser/ui/webui/extensions/extension_basic_info.h',
+      'browser/ui/webui/extensions/extension_error_ui_util.cc',
+      'browser/ui/webui/extensions/extension_error_ui_util.h',
+      'browser/ui/webui/extensions/extension_icon_source.cc',
+      'browser/ui/webui/extensions/extension_icon_source.h',
+      'browser/ui/webui/extensions/extension_info_ui.cc',
+      'browser/ui/webui/extensions/extension_info_ui.h',
+      'browser/ui/webui/extensions/pack_extension_handler.cc',
+      'browser/ui/webui/extensions/pack_extension_handler.h',
+    ],
   },
   'targets': [
     {
       'target_name': 'browser_ui',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
       # Since browser and browser_ui actually depend on each other,
       # we must omit the dependency from browser_ui to browser.
       # However, this means browser_ui and browser should more or less
       # have the same dependencies. Once browser_ui is untangled from
@@ skipping 382 matching lines @@
               'sources': [
                 '<@(chrome_browser_ui_autofill_dialog_non_mobile_sources)',
               ],
               'dependencies': [
                 '../third_party/libaddressinput/libaddressinput.gyp:libaddressinput',
                 '../third_party/libaddressinput/libaddressinput.gyp:libaddressinput_strings',
               ],
             }],
           ],
         }],
+        ['enable_extensions==1', {
+          'sources': [ '<@(chrome_browser_ui_extensions_sources)' ],
+        }],
         ['enable_google_now==1 and OS!="android"', {
           'sources': [ '<@(chrome_browser_ui_google_now_non_android_sources)' ],
         }],
         ['enable_webrtc==1', {
           'sources': [ '<@(chrome_browser_ui_webrtc_sources)' ],
         }],
         ['enable_service_discovery==1', {
           'sources': [ '<@(chrome_browser_ui_service_discovery_sources)' ],
         }],
         ['enable_spellcheck==1', {
           'dependencies': [
             '../third_party/hunspell/hunspell.gyp:hunspell',
           ],
         }],
       ],
     },
   ],
 }