[iOS] - Fix #34752: Add Variations Support (#21283)

- Add Variations Support for iOS

build/commands/lib/config.js

@@ -709,7 +709,6 @@ Config.prototype.buildArgs = function () {
     delete args.webcompat_report_api_endpoint
     delete args.use_blink_v8_binding_new_idl_interface
     delete args.v8_enable_verify_heap
-    delete args.brave_variations_server_url
     delete args.enable_dangling_raw_ptr_checks
   }
 

ios/app/BUILD.gn

@@ -33,6 +33,7 @@ source_set("app") {
     "//brave/components/p3a:buildflags",
     "//brave/components/skus/browser",
     "//brave/components/update_client:buildflags",
+    "//brave/components/variations:constants",
     "//brave/ios/app/resources",
     "//brave/ios/browser",
     "//brave/ios/browser/api/ads",
@@ -65,6 +66,7 @@ source_set("app") {
     "//components/send_tab_to_self",
     "//components/sync/base",
     "//components/sync/service",
+    "//components/variations",
     "//ios/chrome/app:app_internal",
     "//ios/chrome/app:tests_fake_hook",
     "//ios/chrome/app/startup:startup",

ios/app/DEPS

@@ -4,18 +4,19 @@ include_rules = [
   "+ios/chrome/common",
   "+brave/ios/app",
   "+brave/ios/browser",
+  "+components/browser_sync",
   "+components/component_updater/component_updater_paths.h",
   "+components/component_updater/component_updater_service.h",
   "+components/component_updater/component_updater_switches.h",
   "+components/component_updater/installer_policies",
-  "+components/prefs",
-  "+components/sync/service",
-  "+components/sync/base",
-  "+components/browser_sync",
   "+components/history/core/browser",
   "+components/keyed_service/core",
+  "+components/prefs",
   "+components/password_manager/core",
   "+components/send_tab_to_self",
+  "+components/sync/base",
+  "+components/sync/service",
+  "+components/variations/variations_switches.h",
   "+ios/public/provider/chrome/browser/chrome_browser_provider.h",
   "+ios/public/provider/chrome/browser/overrides/overrides_api.h",
   "+ios/public/provider/chrome/browser/ui_utils/ui_utils_api.h",

ios/app/brave_main_delegate.mm

@@ -16,10 +16,12 @@
 #include "brave/components/brave_component_updater/browser/switches.h"
 #include "brave/components/brave_sync/buildflags.h"
 #include "brave/components/update_client/buildflags.h"
+#include "brave/components/variations/buildflags.h"
 #include "components/browser_sync/browser_sync_switches.h"
 #include "components/component_updater/component_updater_switches.h"
 #include "components/sync/base/command_line_switches.h"
 #include "components/sync/base/model_type.h"
+#include "components/variations/variations_switches.h"
 #include "ios/chrome/browser/flags/chrome_switches.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ -70,6 +72,20 @@ @implementation BundleLookupClass
                                     BUILDFLAG(BRAVE_SYNC_ENDPOINT));
   }
 
+  // Brave variations
+  if (!command_line->HasSwitch(variations::switches::kVariationsServerURL)) {
+    command_line->AppendSwitchASCII(variations::switches::kVariationsServerURL,
+                                    BUILDFLAG(BRAVE_VARIATIONS_SERVER_URL));
+
+    // Insecure fall-back for variations is set to the same (secure) URL. This
+    // is done so that if VariationsService tries to fall back to insecure url
+    // the check for kHttpScheme in VariationsService::MaybeRetryOverHTTP would
+    // prevent it from doing so as we don't want to use an insecure fall-back.
+    command_line->AppendSwitchASCII(
+        variations::switches::kVariationsInsecureServerURL,
+        BUILDFLAG(BRAVE_VARIATIONS_SERVER_URL));
+  }
+
   if (!command_line->HasSwitch(switches::kVModule)) {
     command_line->AppendSwitchASCII(switches::kVModule, "*/brave/*=0");
   }