[ios] Fix compilation when widgets and extensions are disabled

Applications build for the macOS "catalyst" environment do not support
the extensions or widgets that ships with Chrome on iOS. Fix the build
when the variables used to enabled them are set to false.

Add assertion to ensure that the BUILD.gn defining the extensions and
widgets are not included when the variables are set to false, in order
to prevent from accidental inclusion.

Add a gn variable to control whether screen_time is enabled or not.
It will allow disabling it when environment is macOS "catalyst".

Bug: 1138425
Change-Id: If2cf9734c0595098cb2f60247702f73cf5da7d63
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2498593
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Auto-Submit: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821287}

ios/BUILD.gn

@@ -22,9 +22,6 @@ group("all") {
     deps = [
       # List all the targets that need to be built on iOS by default.
       "//ios/chrome/app:chrome",
-      "//ios/chrome/content_widget_extension",
-      "//ios/chrome/search_widget_extension",
-      "//ios/chrome/share_extension",
       "//ios/showcase",
       "//ios/web/shell:ios_web_shell",
       "//ios/web_view/shell:ios_web_view_shell",

ios/build/chrome_build.gni

@@ -67,6 +67,9 @@ declare_args() {
   ios_chrome_cpe_entitlements_additions = []
 }
 
+# ScreenTime is only available in iOS 14.0+ SDK.
+ios_enable_screen_time = xcode_version_int >= 1200
+
 # Configure whether breakpad support is enabled.
 breakpad_enabled = is_official_build && is_chrome_branded
 

ios/chrome/app/BUILD.gn

@@ -217,7 +217,7 @@ source_set("app_internal") {
     "//ios/chrome/browser/crash_report:crash_report_internal",
     "//ios/chrome/browser/crash_report/breadcrumbs",
     "//ios/chrome/browser/crash_report/breadcrumbs:feature_flags",
-    "//ios/chrome/browser/credential_provider",
+    "//ios/chrome/browser/credential_provider:buildflags",
     "//ios/chrome/browser/download",
     "//ios/chrome/browser/external_files",
     "//ios/chrome/browser/favicon",
@@ -288,6 +288,10 @@ source_set("app_internal") {
     "//ui/strings:ui_strings",
   ]
 
+  if (ios_enable_credential_provider_extension) {
+    deps += [ "//ios/chrome/browser/credential_provider" ]
+  }
+
   frameworks = [
     "CoreSpotlight.framework",
     "MediaPlayer.framework",

ios/chrome/app/main_controller.mm

@@ -57,8 +57,7 @@
 #include "ios/chrome/browser/crash_report/crash_loop_detection_util.h"
 #include "ios/chrome/browser/crash_report/crash_report_helper.h"
 #import "ios/chrome/browser/crash_report/crash_restore_helper.h"
-#include "ios/chrome/browser/credential_provider/credential_provider_service_factory.h"
-#include "ios/chrome/browser/credential_provider/credential_provider_support.h"
+#include "ios/chrome/browser/credential_provider/credential_provider_buildflags.h"
 #include "ios/chrome/browser/download/download_directory_util.h"
 #import "ios/chrome/browser/external_files/external_file_remover_factory.h"
 #import "ios/chrome/browser/external_files/external_file_remover_impl.h"
@@ -112,6 +111,11 @@
 #import "net/base/mac/url_conversions.h"
 #include "services/network/public/cpp/shared_url_loader_factory.h"
 
+#if BUILDFLAG(IOS_CREDENTIAL_PROVIDER_ENABLED)
+#include "ios/chrome/browser/credential_provider/credential_provider_service_factory.h"
+#include "ios/chrome/browser/credential_provider/credential_provider_support.h"
+#endif
+
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
@@ -534,10 +538,12 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
           self.appState.mainBrowserState);
   service->Initialize();
 
+#if BUILDFLAG(IOS_CREDENTIAL_PROVIDER_ENABLED)
   if (IsCredentialProviderExtensionSupported()) {
     CredentialProviderServiceFactory::GetForBrowserState(
         self.appState.mainBrowserState);
   }
+#endif
 
   _windowConfigurationRecorder = [[WindowConfigurationRecorder alloc] init];
 

ios/chrome/browser/browser_state/BUILD.gn

@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//ios/build/chrome_build.gni")
+
 source_set("browser_state") {
   sources = [
     "browser_state_otr_helper.cc",
@@ -94,7 +96,7 @@ source_set("browser_state_impl") {
     "//ios/chrome/browser/browsing_data",
     "//ios/chrome/browser/content_settings",
     "//ios/chrome/browser/crash_report/breadcrumbs",
-    "//ios/chrome/browser/credential_provider",
+    "//ios/chrome/browser/credential_provider:buildflags",
     "//ios/chrome/browser/device_sharing",
     "//ios/chrome/browser/discover_feed",
     "//ios/chrome/browser/dom_distiller",
@@ -117,8 +119,7 @@ source_set("browser_state_impl") {
     "//ios/chrome/browser/prefs:browser_prefs",
     "//ios/chrome/browser/reading_list",
     "//ios/chrome/browser/safe_browsing",
-    "//ios/chrome/browser/screen_time",
-    "//ios/chrome/browser/screen_time:feature_flags",
+    "//ios/chrome/browser/screen_time:buildflags",
     "//ios/chrome/browser/search_engines",
     "//ios/chrome/browser/send_tab_to_self",
     "//ios/chrome/browser/sessions",
@@ -141,6 +142,15 @@ source_set("browser_state_impl") {
     "//net",
     "//net:extras",
   ]
+  if (ios_enable_screen_time) {
+    deps += [
+      "//ios/chrome/browser/screen_time",
+      "//ios/chrome/browser/screen_time:feature_flags",
+    ]
+  }
+  if (ios_enable_credential_provider_extension) {
+    deps += [ "//ios/chrome/browser/credential_provider" ]
+  }
   allow_circular_includes_from = [
     "//ios/chrome/browser",
     "//ios/chrome/browser/browser_state_metrics",

ios/chrome/browser/browser_state/browser_state_keyed_service_factories.mm

@@ -14,7 +14,7 @@
 #include "ios/chrome/browser/browsing_data/browsing_data_remover_factory.h"
 #include "ios/chrome/browser/content_settings/cookie_settings_factory.h"
 #include "ios/chrome/browser/crash_report/breadcrumbs/breadcrumb_manager_keyed_service_factory.h"
-#include "ios/chrome/browser/credential_provider/credential_provider_service_factory.h"
+#include "ios/chrome/browser/credential_provider/credential_provider_buildflags.h"
 #import "ios/chrome/browser/device_sharing/device_sharing_manager_factory.h"
 #include "ios/chrome/browser/discover_feed/discover_feed_service_factory.h"
 #include "ios/chrome/browser/dom_distiller/dom_distiller_service_factory.h"
@@ -41,7 +41,7 @@
 #include "ios/chrome/browser/reading_list/reading_list_model_factory.h"
 #import "ios/chrome/browser/safe_browsing/real_time_url_lookup_service_factory.h"
 #import "ios/chrome/browser/safe_browsing/verdict_cache_manager_factory.h"
-#import "ios/chrome/browser/screen_time/features.h"
+#include "ios/chrome/browser/screen_time/screen_time_buildflags.h"
 #include "ios/chrome/browser/search_engines/template_url_service_factory.h"
 #include "ios/chrome/browser/signin/about_signin_internals_factory.h"
 #include "ios/chrome/browser/signin/account_consistency_service_factory.h"
@@ -64,9 +64,14 @@
 #include "ios/chrome/browser/unified_consent/unified_consent_service_factory.h"
 #include "ios/chrome/browser/webdata_services/web_data_service_factory.h"
 
-#if defined(__IPHONE_14_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_14_0
+#if BUILDFLAG(IOS_CREDENTIAL_PROVIDER_ENABLED)
+#include "ios/chrome/browser/credential_provider/credential_provider_service_factory.h"
+#endif
+
+#if BUILDFLAG(IOS_SCREEN_TIME_ENABLED)
+#import "ios/chrome/browser/screen_time/features.h"
 #import "ios/chrome/browser/screen_time/screen_time_history_deleter_factory.h"
-#endif  // __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_14_0
+#endif
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
@@ -108,7 +113,6 @@ void EnsureBrowserStateKeyedServiceFactoriesBuilt() {
   BrowserDownloadServiceFactory::GetInstance();
   BrowsingDataRemoverFactory::GetInstance();
   ConsentAuditorFactory::GetInstance();
-  CredentialProviderServiceFactory::GetInstance();
   DeviceSharingManagerFactory::GetInstance();
   DiscoverFeedServiceFactory::GetInstance();
   GoogleLogoServiceFactory::GetInstance();
@@ -142,11 +146,15 @@ void EnsureBrowserStateKeyedServiceFactoriesBuilt() {
     PolicyBlocklistServiceFactory::GetInstance();
   }
 
-#if defined(__IPHONE_14_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_14_0
-  if (@available(iOS 14, *)) {
-    if (IsScreenTimeIntegrationEnabled()) {
+#if BUILDFLAG(IOS_CREDENTIAL_PROVIDER_ENABLED)
+  CredentialProviderServiceFactory::GetInstance();
+#endif
+
+#if BUILDFLAG(IOS_SCREEN_TIME_ENABLED)
+  if (IsScreenTimeIntegrationEnabled()) {
+    if (@available(iOS 14, *)) {
       ScreenTimeHistoryDeleterFactory::GetInstance();
     }
   }
-#endif  // __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_14_0
+#endif
 }

ios/chrome/browser/credential_provider/BUILD.gn

@@ -6,74 +6,75 @@ import("//build/buildflag_header.gni")
 import("//build/config/ios/ios_sdk.gni")
 import("//ios/build/chrome_build.gni")
 
-source_set("credential_provider") {
-  configs += [ "//build/config/compiler:enable_arc" ]
-  sources = [
-    "archivable_credential+password_form.h",
-    "archivable_credential+password_form.mm",
-    "credential_provider_service.h",
-    "credential_provider_service.mm",
-    "credential_provider_service_factory.h",
-    "credential_provider_service_factory.mm",
-    "credential_provider_support.cc",
-    "credential_provider_support.h",
-    "credential_provider_util.h",
-    "credential_provider_util.mm",
-  ]
-  deps = [
-    ":buildflags",
-    "//base",
-    "//components/autofill/core/common",
-    "//components/keyed_service/core",
-    "//components/keyed_service/ios",
-    "//components/password_manager/core/browser",
-    "//components/password_manager/core/browser:affiliation",
-    "//components/signin/public/identity_manager",
-    "//ios/chrome/browser/browser_state",
-    "//ios/chrome/browser/passwords",
-    "//ios/chrome/browser/signin",
-    "//ios/chrome/browser/sync",
-    "//ios/chrome/common/app_group",
-    "//ios/chrome/common/credential_provider",
-    "//ios/public/provider/chrome/browser/signin",
-    "//url",
-  ]
-  frameworks = [
-    "AuthenticationServices.framework",
-    "Foundation.framework",
-  ]
-}
-
 buildflag_header("buildflags") {
   header = "credential_provider_buildflags.h"
-  header_dir = "ios/chrome/browser/ui/util"
   flags = [
     "IOS_CREDENTIAL_PROVIDER_ENABLED=$ios_enable_credential_provider_extension",
   ]
 }
 
-source_set("unit_tests") {
-  configs += [ "//build/config/compiler:enable_arc" ]
-  testonly = true
-  sources = [
-    "archivable_credential+password_form_unittest.mm",
-    "credential_provider_service_unittest.mm",
-  ]
-  deps = [
-    ":credential_provider",
-    "//base/test:test_support",
-    "//components/autofill/core/common",
-    "//components/password_manager/core/browser:test_support",
-    "//ios/chrome/browser/browser_state:test_support",
-    "//ios/chrome/browser/signin",
-    "//ios/chrome/browser/signin:test_support",
-    "//ios/chrome/common/app_group",
-    "//ios/chrome/common/credential_provider",
-    "//ios/chrome/common/credential_provider:ui",
-    "//ios/public/provider/chrome/browser/signin:fake_chrome_identity",
-    "//ios/public/provider/chrome/browser/signin:test_support",
-    "//ios/web/public/test",
-    "//testing/gtest",
-    "//url",
-  ]
+if (ios_enable_credential_provider_extension) {
+  source_set("credential_provider") {
+    configs += [ "//build/config/compiler:enable_arc" ]
+    sources = [
+      "archivable_credential+password_form.h",
+      "archivable_credential+password_form.mm",
+      "credential_provider_service.h",
+      "credential_provider_service.mm",
+      "credential_provider_service_factory.h",
+      "credential_provider_service_factory.mm",
+      "credential_provider_support.cc",
+      "credential_provider_support.h",
+      "credential_provider_util.h",
+      "credential_provider_util.mm",
+    ]
+    deps = [
+      ":buildflags",
+      "//base",
+      "//components/autofill/core/common",
+      "//components/keyed_service/core",
+      "//components/keyed_service/ios",
+      "//components/password_manager/core/browser",
+      "//components/password_manager/core/browser:affiliation",
+      "//components/signin/public/identity_manager",
+      "//ios/chrome/browser/browser_state",
+      "//ios/chrome/browser/passwords",
+      "//ios/chrome/browser/signin",
+      "//ios/chrome/browser/sync",
+      "//ios/chrome/common/app_group",
+      "//ios/chrome/common/credential_provider",
+      "//ios/public/provider/chrome/browser/signin",
+      "//url",
+    ]
+    frameworks = [
+      "AuthenticationServices.framework",
+      "Foundation.framework",
+    ]
+  }
+
+  source_set("unit_tests") {
+    configs += [ "//build/config/compiler:enable_arc" ]
+    testonly = true
+    sources = [
+      "archivable_credential+password_form_unittest.mm",
+      "credential_provider_service_unittest.mm",
+    ]
+    deps = [
+      ":credential_provider",
+      "//base/test:test_support",
+      "//components/autofill/core/common",
+      "//components/password_manager/core/browser:test_support",
+      "//ios/chrome/browser/browser_state:test_support",
+      "//ios/chrome/browser/signin",
+      "//ios/chrome/browser/signin:test_support",
+      "//ios/chrome/common/app_group",
+      "//ios/chrome/common/credential_provider",
+      "//ios/chrome/common/credential_provider:ui",
+      "//ios/public/provider/chrome/browser/signin:fake_chrome_identity",
+      "//ios/public/provider/chrome/browser/signin:test_support",
+      "//ios/web/public/test",
+      "//testing/gtest",
+      "//url",
+    ]
+  }
 }

ios/chrome/browser/credential_provider/credential_provider_support.cc

@@ -4,7 +4,7 @@
 
 #include "ios/chrome/browser/credential_provider/credential_provider_support.h"
 
-#include "ios/chrome/browser/ui/util/credential_provider_buildflags.h"
+#include "ios/chrome/browser/credential_provider/credential_provider_buildflags.h"
 
 bool IsCredentialProviderExtensionSupported() {
   return BUILDFLAG(IOS_CREDENTIAL_PROVIDER_ENABLED);

ios/chrome/browser/flags/BUILD.gn

@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//ios/build/chrome_build.gni")
+
 source_set("flags") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
@@ -49,7 +51,7 @@ source_set("flags") {
     "//ios/chrome/browser/drag_and_drop",
     "//ios/chrome/browser/open_in:features",
     "//ios/chrome/browser/policy:feature_flags",
-    "//ios/chrome/browser/screen_time:feature_flags",
+    "//ios/chrome/browser/screen_time:buildflags",
     "//ios/chrome/browser/ui:feature_flags",
     "//ios/chrome/browser/ui/content_suggestions:feature_flags",
     "//ios/chrome/browser/ui/download:features",
@@ -67,6 +69,10 @@ source_set("flags") {
     "//ios/web/common:web_view_creation_util",
     "//ios/web/public",
   ]
+
+  if (ios_enable_screen_time) {
+    deps += [ "//ios/chrome/browser/screen_time:feature_flags" ]
+  }
 }
 
 source_set("unit_tests") {

ios/chrome/browser/flags/about_flags.mm

@@ -62,7 +62,7 @@
 #include "ios/chrome/browser/flags/ios_chrome_flag_descriptions.h"
 #import "ios/chrome/browser/open_in/features.h"
 #include "ios/chrome/browser/policy/policy_features.h"
-#include "ios/chrome/browser/screen_time/features.h"
+#include "ios/chrome/browser/screen_time/screen_time_buildflags.h"
 #include "ios/chrome/browser/system_flags.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_feature.h"
 #import "ios/chrome/browser/ui/download/features.h"
@@ -81,6 +81,10 @@
 #include "ios/web/common/user_agent.h"
 #include "ios/web/common/web_view_creation_util.h"
 
+#if BUILDFLAG(IOS_SCREEN_TIME_ENABLED)
+#include "ios/chrome/browser/screen_time/features.h"
+#endif
+
 #if !defined(OFFICIAL_BUILD)
 #include "components/variations/variations_switches.h"
 #endif
@@ -614,10 +618,12 @@ const flags_ui::FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kEnableCloseAllTabsConfirmationName,
      flag_descriptions::kEnableCloseAllTabsConfirmationDescription,
      flags_ui::kOsIos, FEATURE_VALUE_TYPE(kEnableCloseAllTabsConfirmation)},
+#if BUILDFLAG(IOS_SCREEN_TIME_ENABLED)
     {"screen-time-integration-ios",
      flag_descriptions::kScreenTimeIntegrationName,
      flag_descriptions::kScreenTimeIntegrationDescription, flags_ui::kOsIos,
      FEATURE_VALUE_TYPE(kScreenTimeIntegration)},
+#endif
     {"mobile-identity-consistency",
      flag_descriptions::kMobileIdentityConsistencyName,
      flag_descriptions::kMobileIdentityConsistencyDescription, flags_ui::kOsIos,

ios/chrome/browser/screen_time/BUILD.gn

@@ -2,12 +2,25 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//build/config/ios/ios_sdk.gni")
+import("//build/buildflag_header.gni")
+import("//ios/build/chrome_build.gni")
 
-source_set("screen_time") {
-  # TODO(crbug.com/1123704): remove when it is recommended to build Chromium
-  # with version 12.0 or later of Xcode.
-  if (xcode_version_int >= 1200) {
+buildflag_header("buildflags") {
+  header = "screen_time_buildflags.h"
+  flags = [ "IOS_SCREEN_TIME_ENABLED=$ios_enable_screen_time" ]
+}
+
+if (ios_enable_screen_time) {
+  source_set("feature_flags") {
+    sources = [
+      "features.h",
+      "features.mm",
+    ]
+    configs += [ "//build/config/compiler:enable_arc" ]
+    deps = [ "//base" ]
+  }
+
+  source_set("screen_time") {
     sources = [
       "screen_time_history_deleter.h",
       "screen_time_history_deleter.mm",
@@ -26,12 +39,3 @@ source_set("screen_time") {
     ]
   }
 }
-
-source_set("feature_flags") {
-  sources = [
-    "features.h",
-    "features.mm",
-  ]
-  configs += [ "//build/config/compiler:enable_arc" ]
-  deps = [ "//base" ]
-}

ios/chrome/browser/ui/browser_container/BUILD.gn

@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//ios/build/chrome_build.gni")
+
 source_set("browser_container") {
   sources = [
     "browser_container_coordinator.h",
@@ -18,16 +20,22 @@ source_set("browser_container") {
     "//ios/chrome/browser/main",
     "//ios/chrome/browser/overlays",
     "//ios/chrome/browser/overlays/public/web_content_area",
-    "//ios/chrome/browser/screen_time:feature_flags",
+    "//ios/chrome/browser/screen_time:buildflags",
     "//ios/chrome/browser/ui/commands",
     "//ios/chrome/browser/ui/coordinators:chrome_coordinators",
     "//ios/chrome/browser/ui/link_to_text",
     "//ios/chrome/browser/ui/overlays",
-    "//ios/chrome/browser/ui/screen_time",
     "//ios/chrome/browser/web_state_list",
     "//ios/web/public",
     "//url",
   ]
+
+  if (ios_enable_screen_time) {
+    deps += [
+      "//ios/chrome/browser/screen_time:feature_flags",
+      "//ios/chrome/browser/ui/screen_time",
+    ]
+  }
 }
 
 source_set("ui") {

ios/chrome/browser/ui/browser_container/browser_container_coordinator.mm

@@ -9,7 +9,7 @@
 #include "base/check.h"
 #import "ios/chrome/browser/main/browser.h"
 #import "ios/chrome/browser/overlays/public/overlay_presenter.h"
-#import "ios/chrome/browser/screen_time/features.h"
+#include "ios/chrome/browser/screen_time/screen_time_buildflags.h"
 #import "ios/chrome/browser/ui/browser_container/browser_container_mediator.h"
 #import "ios/chrome/browser/ui/browser_container/browser_container_view_controller.h"
 #import "ios/chrome/browser/ui/commands/activity_service_commands.h"
@@ -18,9 +18,10 @@
 #import "ios/chrome/browser/ui/overlays/overlay_container_coordinator.h"
 #import "url/gurl.h"
 
-#if defined(__IPHONE_14_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_14_0
+#if BUILDFLAG(IOS_SCREEN_TIME_ENABLED)
+#import "ios/chrome/browser/screen_time/features.h"
 #import "ios/chrome/browser/ui/screen_time/screen_time_coordinator.h"
-#endif  // __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_14_0
+#endif
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
@@ -98,10 +99,10 @@
 // Sets up the ScreenTime coordinator, which installs and manages the ScreenTime
 // blocking view.
 - (void)setUpScreenTimeIfEnabled {
+#if BUILDFLAG(IOS_SCREEN_TIME_ENABLED)
   if (!IsScreenTimeIntegrationEnabled())
     return;
 
-#if defined(__IPHONE_14_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_14_0
   if (@available(iOS 14, *)) {
     ScreenTimeCoordinator* screenTimeCoordinator =
         [[ScreenTimeCoordinator alloc]
@@ -112,7 +113,7 @@
         screenTimeCoordinator.viewController;
     self.screenTimeCoordinator = screenTimeCoordinator;
   }
-#endif  // __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_14_0
+#endif
 }
 
 @end

ios/chrome/browser/ui/screen_time/BUILD.gn

@@ -2,36 +2,36 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//build/config/ios/ios_sdk.gni")
+import("//ios/build/chrome_build.gni")
+
+assert(
+    ios_enable_screen_time,
+    "ios_enable_screen_time must be true to depend on //ios/chrome/browser/ui/screen_time")
 
 source_set("screen_time") {
-  # TODO(crbug.com/1123704): remove when it is recommended to build Chromium
-  # with version 12.0 or later of Xcode.
-  if (xcode_version_int >= 1200) {
-    sources = [
-      "screen_time_consumer.h",
-      "screen_time_coordinator.h",
-      "screen_time_coordinator.mm",
-      "screen_time_mediator.h",
-      "screen_time_mediator.mm",
-      "screen_time_view_controller.h",
-      "screen_time_view_controller.mm",
-    ]
-    frameworks = [
-      "UIKit.framework",
-      "ScreenTime.framework",
-    ]
-    configs += [ "//build/config/compiler:enable_arc" ]
-    deps = [
-      "//base",
-      "//ios/chrome/browser/browser_state",
-      "//ios/chrome/browser/main:public",
-      "//ios/chrome/browser/screen_time",
-      "//ios/chrome/browser/ui/coordinators:chrome_coordinators",
-      "//ios/chrome/browser/web_state_list",
-      "//ios/chrome/common/ui/util",
-      "//ios/web/public",
-      "//net",
-    ]
-  }
+  sources = [
+    "screen_time_consumer.h",
+    "screen_time_coordinator.h",
+    "screen_time_coordinator.mm",
+    "screen_time_mediator.h",
+    "screen_time_mediator.mm",
+    "screen_time_view_controller.h",
+    "screen_time_view_controller.mm",
+  ]
+  frameworks = [
+    "UIKit.framework",
+    "ScreenTime.framework",
+  ]
+  configs += [ "//build/config/compiler:enable_arc" ]
+  deps = [
+    "//base",
+    "//ios/chrome/browser/browser_state",
+    "//ios/chrome/browser/main:public",
+    "//ios/chrome/browser/screen_time",
+    "//ios/chrome/browser/ui/coordinators:chrome_coordinators",
+    "//ios/chrome/browser/web_state_list",
+    "//ios/chrome/common/ui/util",
+    "//ios/web/public",
+    "//net",
+  ]
 }

ios/chrome/content_widget_extension/BUILD.gn

@@ -11,6 +11,10 @@ import("//ios/build/config.gni")
 import("//ios/chrome/tools/strings/generate_localizable_strings.gni")
 import("//tools/grit/repack.gni")
 
+assert(
+    ios_enable_content_widget_extension,
+    "ios_enable_content_widget_extension must be true to depend on //ios/chrome/content_widget_extension")
+
 tweak_info_plist("tweak_info_plist") {
   info_plist = "Info.plist"
 

ios/chrome/credential_provider_extension/BUILD.gn

@@ -12,6 +12,10 @@ import("//ios/chrome/extension_repack.gni")
 import("//ios/chrome/tools/strings/generate_localizable_strings.gni")
 import("//ios/public/provider/chrome/browser/build_config.gni")
 
+assert(
+    ios_enable_credential_provider_extension,
+    "ios_enable_credential_provider_extension must be true to depend on //ios/chrome/credential_provider_extension")
+
 group("resources") {
   deps = [ "//ios/chrome/credential_provider_extension/strings" ]
 }

ios/chrome/search_widget_extension/BUILD.gn

@@ -11,6 +11,10 @@ import("//ios/build/config.gni")
 import("//ios/chrome/tools/strings/generate_localizable_strings.gni")
 import("//tools/grit/repack.gni")
 
+assert(
+    ios_enable_search_widget_extension,
+    "ios_enable_search_widget_extension must be true to depend on //ios/chrome/search_widget_extension")
+
 tweak_info_plist("tweak_info_plist") {
   info_plist = "Info.plist"
 

ios/chrome/share_extension/BUILD.gn

@@ -12,6 +12,10 @@ import("//ios/chrome/extension_repack.gni")
 import("//ios/chrome/tools/strings/generate_localizable_strings.gni")
 import("//ios/public/provider/chrome/browser/build_config.gni")
 
+assert(
+    ios_enable_share_extension,
+    "ios_enable_share_extension must be true to depend on //ios/chrome/share_extension")
+
 group("resources") {
   deps = [ "//ios/chrome/share_extension/strings" ]
 }

ios/chrome/test/BUILD.gn

@@ -178,7 +178,6 @@ test("ios_chrome_unittests") {
     "//ios/chrome/browser/complex_tasks:unit_tests",
     "//ios/chrome/browser/crash_report:unit_tests",
     "//ios/chrome/browser/crash_report/breadcrumbs:unit_tests",
-    "//ios/chrome/browser/credential_provider:unit_tests",
     "//ios/chrome/browser/device_sharing:unit_tests",
     "//ios/chrome/browser/download:unit_tests",
     "//ios/chrome/browser/drag_and_drop:unit_tests",
@@ -337,12 +336,24 @@ test("ios_chrome_unittests") {
     "//ios/chrome/common/credential_provider:unit_tests",
     "//ios/chrome/common/ui/reauthentication:unit_tests",
     "//ios/chrome/common/ui/util:unit_tests",
-    "//ios/chrome/content_widget_extension:unit_tests",
-    "//ios/chrome/credential_provider_extension:unit_tests",
-    "//ios/chrome/search_widget_extension:unit_tests",
     "//ios/public/provider/chrome/browser/signin:unit_tests",
     "//ios/testing:http_server_bundle_data",
   ]
 
+  if (ios_enable_search_widget_extension) {
+    deps += [ "//ios/chrome/search_widget_extension:unit_tests" ]
+  }
+
+  if (ios_enable_content_widget_extension) {
+    deps += [ "//ios/chrome/content_widget_extension:unit_tests" ]
+  }
+
+  if (ios_enable_credential_provider_extension) {
+    deps += [
+      "//ios/chrome/browser/credential_provider:unit_tests",
+      "//ios/chrome/credential_provider_extension:unit_tests",
+    ]
+  }
+
   assert_no_deps = ios_assert_no_deps
 }

ios/showcase/BUILD.gn

@@ -15,10 +15,11 @@ ios_app_bundle("showcase") {
     ":features",
     "//ios/showcase/core:main",
   ]
-  bundle_deps = [
-    "//ios/chrome/credential_provider_extension:system_strings",
-    "//ios/showcase/core/resources",
-  ]
+  bundle_deps = [ "//ios/showcase/core/resources" ]
+  if (ios_enable_credential_provider_extension) {
+    bundle_deps +=
+        [ "//ios/chrome/credential_provider_extension:system_strings" ]
+  }
   assert_no_deps = ios_assert_no_deps
 }
 

ios/showcase/core/BUILD.gn

@@ -2,6 +2,18 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/buildflag_header.gni")
+import("//ios/build/chrome_build.gni")
+
+buildflag_header("buildflags") {
+  header = "showcase_model_buildflags.h"
+  flags = [
+    "SHOWCASE_CREDENTIAL_PROVIDER_ENABLED=ios_enable_credential_provider_extension",
+    "SHOWCASE_CONTENT_WIDGET_ENABLED=$ios_enable_content_widget_extension",
+    "SHOWCASE_SEARCH_WIDGET_ENABLED=$ios_enable_search_widget_extension",
+  ]
+}
+
 source_set("core") {
   sources = [
     "app_delegate.h",
@@ -12,6 +24,7 @@ source_set("core") {
     "showcase_view_controller.mm",
   ]
   deps = [
+    ":buildflags",
     "//base",
     "//base:i18n",
     "//ios/chrome/browser/ui/main",

ios/showcase/core/showcase_model.mm

@@ -4,6 +4,8 @@
 
 #import "ios/showcase/core/showcase_model.h"
 
+#import "ios/showcase/core/showcase_model_buildflags.h"
+
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
@@ -31,11 +33,13 @@
       showcase::kClassForInstantiationKey : @"StaleCredentialsViewController",
       showcase::kUseCaseKey : @"Credential Provider Stale Credentials UI",
     },
+#if BUILDFLAG(SHOWCASE_CREDENTIAL_PROVIDER_ENABLED)
     @{
       showcase::kClassForDisplayKey : @"CredentialListViewController",
       showcase::kClassForInstantiationKey : @"SCCredentialListCoordinator",
       showcase::kUseCaseKey : @"Credential Provider Credentials List UI",
     },
+#endif
     @{
       showcase::kClassForDisplayKey : @"ContentSuggestionsViewController",
       showcase::kClassForInstantiationKey : @"SCContentSuggestionsCoordinator",
@@ -66,16 +70,20 @@
       showcase::kClassForInstantiationKey : @"UIKitTableViewCellViewController",
       showcase::kUseCaseKey : @"UIKit Table Cells",
     },
+#if BUILDFLAG(SHOWCASE_SEARCH_WIDGET_ENABLED)
     @{
       showcase::kClassForDisplayKey : @"SearchWidgetViewController",
       showcase::kClassForInstantiationKey : @"SCSearchWidgetCoordinator",
       showcase::kUseCaseKey : @"Search Widget",
     },
+#endif
+#if BUILDFLAG(SHOWCASE_CONTENT_WIDGET_ENABLED)
     @{
       showcase::kClassForDisplayKey : @"ContentWidgetViewController",
       showcase::kClassForInstantiationKey : @"SCContentWidgetCoordinator",
       showcase::kUseCaseKey : @"Content Widget",
     },
+#endif
     @{
       showcase::kClassForDisplayKey : @"TextBadgeView",
       showcase::kClassForInstantiationKey : @"SCTextBadgeViewController",

ios/showcase/credential_provider/BUILD.gn

@@ -2,16 +2,21 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//ios/build/chrome_build.gni")
+
 source_set("credential_provider") {
-  sources = [
-    "sc_credential_list_coordinator.h",
-    "sc_credential_list_coordinator.mm",
-  ]
-  deps = [
-    "//ios/chrome/common/credential_provider:ui",
-    "//ios/chrome/credential_provider_extension/ui",
-    "//ios/showcase/common",
-  ]
+  sources = []
+  deps = [ "//ios/showcase/common" ]
+  if (ios_enable_credential_provider_extension) {
+    sources += [
+      "sc_credential_list_coordinator.h",
+      "sc_credential_list_coordinator.mm",
+    ]
+    deps += [
+      "//ios/chrome/common/credential_provider:ui",
+      "//ios/chrome/credential_provider_extension/ui",
+    ]
+  }
   frameworks = [ "UIKit.framework" ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }
@@ -23,7 +28,7 @@ source_set("eg2_tests") {
     "//build/config/ios:xctest_config",
   ]
   testonly = true
-  sources = [ "credential_provider_egtest.mm" ]
+  sources = []
   deps = [
     "//base",
     "//ios/chrome/common/ui/confirmation_alert",
@@ -32,5 +37,10 @@ source_set("eg2_tests") {
     "//ios/third_party/earl_grey2:test_lib",
     "//ui/base",
   ]
+
+  if (ios_enable_credential_provider_extension) {
+    sources += [ "credential_provider_egtest.mm" ]
+  }
+
   frameworks = [ "UIKit.framework" ]
 }

ios/showcase/widget/BUILD.gn

@@ -2,18 +2,25 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//ios/build/chrome_build.gni")
+
 source_set("widget") {
-  sources = [
-    "sc_content_widget_coordinator.h",
-    "sc_content_widget_coordinator.mm",
-    "sc_search_widget_coordinator.h",
-    "sc_search_widget_coordinator.mm",
-  ]
-  deps = [
-    "//ios/chrome/content_widget_extension:content_widget",
-    "//ios/chrome/search_widget_extension:search_widget",
-    "//ios/showcase/common",
-  ]
+  sources = []
+  deps = [ "//ios/showcase/common" ]
+  if (ios_enable_content_widget_extension) {
+    sources += [
+      "sc_content_widget_coordinator.h",
+      "sc_content_widget_coordinator.mm",
+    ]
+    deps += [ "//ios/chrome/content_widget_extension:content_widget" ]
+  }
+  if (ios_enable_search_widget_extension) {
+    sources += [
+      "sc_search_widget_coordinator.h",
+      "sc_search_widget_coordinator.mm",
+    ]
+    deps += [ "//ios/chrome/search_widget_extension:search_widget" ]
+  }
   frameworks = [ "UIKit.framework" ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }