[Autofill iOS] Fix Autofill CC filling on iOS

Server card fetching requires that ChromeAutofillClientIOS returns
a valid sync_service.

Bug: 825319, 535784
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ic59cfd5fba28f0fa3721806bcfbfc91829f75445
Reviewed-on: https://chromium-review.googlesource.com/1023930
Commit-Queue: Olivier Robin <olivierrobin@chromium.org>
Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553067}

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

@@ -21,6 +21,7 @@ source_set("autofill") {
     "//components/autofill/core/browser",
     "//components/autofill/core/common",
     "//components/autofill/ios/browser",
+    "//components/browser_sync",
     "//components/infobars/core",
     "//components/keyed_service/core",
     "//components/password_manager/core/browser",
@@ -33,6 +34,7 @@ source_set("autofill") {
     "//ios/chrome/browser/infobars",
     "//ios/chrome/browser/signin",
     "//ios/chrome/browser/ssl",
+    "//ios/chrome/browser/sync",
     "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui/autofill/cells",
     "//ios/chrome/browser/ui/collection_view/cells",

ios/chrome/browser/ui/autofill/chrome_autofill_client_ios.h

@@ -92,6 +92,7 @@ class ChromeAutofillClientIOS : public AutofillClient {
 
  private:
   PrefService* pref_service_;
+  syncer::SyncService* sync_service_;
   PersonalDataManager* personal_data_manager_;
   web::WebState* web_state_;
   __weak id<AutofillClientIOSBridge> bridge_;

ios/chrome/browser/ui/autofill/chrome_autofill_client_ios.mm

@@ -17,6 +17,7 @@
 #include "components/autofill/core/common/autofill_features.h"
 #include "components/autofill/core/common/autofill_pref_names.h"
 #include "components/autofill/ios/browser/autofill_util.h"
+#include "components/browser_sync/profile_sync_service.h"
 #include "components/infobars/core/infobar.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "ios/chrome/browser/application_context.h"
@@ -25,6 +26,7 @@
 #include "ios/chrome/browser/infobars/infobar_utils.h"
 #include "ios/chrome/browser/signin/identity_manager_factory.h"
 #import "ios/chrome/browser/ssl/insecure_input_tab_helper.h"
+#include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
 #include "ios/chrome/browser/ui/autofill/card_unmask_prompt_view_bridge.h"
 #include "ios/chrome/browser/web_data_service_factory.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
@@ -42,6 +44,8 @@ ChromeAutofillClientIOS::ChromeAutofillClientIOS(
     id<AutofillClientIOSBridge> bridge,
     password_manager::PasswordGenerationManager* password_generation_manager)
     : pref_service_(browser_state->GetPrefs()),
+      sync_service_(IOSChromeProfileSyncServiceFactory::GetForBrowserState(
+          browser_state)),
       personal_data_manager_(PersonalDataManagerFactory::GetForBrowserState(
           browser_state->GetOriginalChromeBrowserState())),
       web_state_(web_state),
@@ -74,9 +78,8 @@ PrefService* ChromeAutofillClientIOS::GetPrefs() {
   return pref_service_;
 }
 
-// TODO(crbug.com/535784): Implement this when adding credit card upload.
 syncer::SyncService* ChromeAutofillClientIOS::GetSyncService() {
-  return nullptr;
+  return sync_service_;
 }
 
 identity::IdentityManager* ChromeAutofillClientIOS::GetIdentityManager() {