Fixes gn-check errors with enable_plugins=false.

chrome/browser/ui/BUILD.gn

 # Copyright 2014 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("//build/config/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 1025 matching lines @@
       "webui/options/language_options_handler_common.cc",
       "webui/options/language_options_handler_common.h",
       "webui/options/manage_profile_handler.cc",
       "webui/options/manage_profile_handler.h",
       "webui/options/media_devices_selection_handler.cc",
       "webui/options/media_devices_selection_handler.h",
       "webui/options/options_ui.cc",
       "webui/options/options_ui.h",
       "webui/options/password_manager_handler.cc",
       "webui/options/password_manager_handler.h",
-      "webui/options/pepper_flash_content_settings_utils.cc",
-      "webui/options/pepper_flash_content_settings_utils.h",
       "webui/options/reset_profile_settings_handler.cc",
       "webui/options/reset_profile_settings_handler.h",
       "webui/options/search_engine_manager_handler.cc",
       "webui/options/search_engine_manager_handler.h",
       "webui/options/startup_pages_handler.cc",
       "webui/options/startup_pages_handler.h",
       "webui/options/supervised_user_create_confirm_handler.cc",
       "webui/options/supervised_user_create_confirm_handler.h",
       "webui/options/supervised_user_import_handler.cc",
       "webui/options/supervised_user_import_handler.h",
@@ skipping 141 matching lines @@
       "webui/nacl_ui.h",
     ]
     deps += [ "//components/nacl/browser" ]
   }
   if (enable_plugins) {
     sources += [
       "hung_plugin_tab_helper.cc",
       "hung_plugin_tab_helper.h",
       "webui/flash_ui.cc",
       "webui/flash_ui.h",
+      "webui/options/pepper_flash_content_settings_utils.cc",
+      "webui/options/pepper_flash_content_settings_utils.h",
     ]
     deps += [ "//ppapi/proxy:ipc" ]
   }
   if (safe_browsing_mode == 1) {
     deps += [
       "//chrome/browser/safe_browsing:chunk_proto",
       "//chrome/common/safe_browsing:proto",
     ]
   }
 
@@ skipping 2277 matching lines @@
       "test/test_confirm_bubble_model.cc",
       "test/test_confirm_bubble_model.h",
     ]
     deps += [ "//chrome/test:test_support_ui" ]
   }
 
   if (enable_extensions) {
     deps += [ "//extensions/browser" ]
   }
 }