Make it possible to build without enable_supervised_users.

chrome/browser/ui/BUILD.gn

Index: chrome/browser/ui/BUILD.gn
diff --git a/chrome/browser/ui/BUILD.gn b/chrome/browser/ui/BUILD.gn
index 89e2159beec992619bb78f370eea42f6fa140fef..da7414cfe2d7bf58023557472f288a93da712fa2 100644
--- a/chrome/browser/ui/BUILD.gn
+++ b/chrome/browser/ui/BUILD.gn
@@ -298,8 +298,6 @@ split_static_library("ui") {
     "webui/chromeos/login/screenlock_icon_source.h",
     "webui/chromeos/login/signin_screen_handler.cc",
     "webui/chromeos/login/signin_screen_handler.h",
-    "webui/chromeos/login/supervised_user_creation_screen_handler.cc",
-    "webui/chromeos/login/supervised_user_creation_screen_handler.h",
     "webui/chromeos/login/terms_of_service_screen_handler.cc",
     "webui/chromeos/login/terms_of_service_screen_handler.h",
     "webui/chromeos/login/update_screen_handler.cc",
@@ -409,10 +407,6 @@ split_static_library("ui") {
     "webui/quota_internals/quota_internals_ui.h",
     "webui/signin_internals_ui.cc",
     "webui/signin_internals_ui.h",
-    "webui/supervised_user_internals_message_handler.cc",
-    "webui/supervised_user_internals_message_handler.h",
-    "webui/supervised_user_internals_ui.cc",
-    "webui/supervised_user_internals_ui.h",
     "webui/sync_internals_message_handler.cc",
     "webui/sync_internals_message_handler.h",
     "webui/sync_internals_ui.cc",
@@ -556,7 +550,6 @@ split_static_library("ui") {
     "//components/subresource_filter/content/browser",
     "//components/subresource_filter/core/browser:browser",
     "//components/suggestions/proto",
-    "//components/supervised_user_error_page",
     "//components/sync",
     "//components/sync_preferences",
     "//components/sync_sessions",
@@ -1063,12 +1056,6 @@ split_static_library("ui") {
       "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",
-      "webui/options/supervised_user_learn_more_handler.cc",
-      "webui/options/supervised_user_learn_more_handler.h",
       "webui/options/sync_setup_handler.cc",
       "webui/options/sync_setup_handler.h",
       "webui/plural_string_handler.cc",
@@ -2057,8 +2044,6 @@ split_static_library("ui") {
       "webui/signin/signin_error_handler.h",
       "webui/signin/signin_error_ui.cc",
       "webui/signin/signin_error_ui.h",
-      "webui/signin/signin_supervised_user_import_handler.cc",
-      "webui/signin/signin_supervised_user_import_handler.h",
       "webui/signin/signin_web_dialog_ui.cc",
       "webui/signin/signin_web_dialog_ui.h",
       "webui/signin/sync_confirmation_handler.cc",
@@ -3525,6 +3510,30 @@ split_static_library("ui") {
       "webui/local_discovery/local_discovery_ui_handler.h",
     ]
   }
+  if (enable_supervised_users) {
+    sources += [
+      "webui/chromeos/login/supervised_user_creation_screen_handler.cc",
+      "webui/chromeos/login/supervised_user_creation_screen_handler.h",
+      "webui/supervised_user_internals_message_handler.cc",
+      "webui/supervised_user_internals_message_handler.h",
+      "webui/supervised_user_internals_ui.cc",
+      "webui/supervised_user_internals_ui.h",
+    ]
+    deps += [ "//components/supervised_user_error_page" ]
+
+    if (!is_android) {
+      sources += [
+        "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",
+        "webui/options/supervised_user_learn_more_handler.cc",
+        "webui/options/supervised_user_learn_more_handler.h",
+        "webui/signin/signin_supervised_user_import_handler.cc",
+        "webui/signin/signin_supervised_user_import_handler.h",
+      ]
+    }
+  }
 }
 
 # In GYP this is part of test_support_common.