Hide Wallet checkbox when user signs out of sync.

chrome/browser/ui/webui/options/autofill_options_handler.h

Index: chrome/browser/ui/webui/options/autofill_options_handler.h
diff --git a/chrome/browser/ui/webui/options/autofill_options_handler.h b/chrome/browser/ui/webui/options/autofill_options_handler.h
index 13b0363261c59d26d34495e1e83f7ee721005236..a9e818d73da8d84fcf3a1d838a832d6bb5804aa9 100644
--- a/chrome/browser/ui/webui/options/autofill_options_handler.h
+++ b/chrome/browser/ui/webui/options/autofill_options_handler.h
@@ -8,6 +8,8 @@
 #include <string>
 
 #include "base/compiler_specific.h"
+#include "chrome/browser/sync/profile_sync_service.h"
+#include "chrome/browser/sync/profile_sync_service_observer.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
 #include "components/autofill/core/browser/personal_data_manager_observer.h"
 
@@ -24,7 +26,8 @@ class ListValue;
 namespace options {
 
 class AutofillOptionsHandler : public OptionsPageUIHandler,
-                               public autofill::PersonalDataManagerObserver {
+                               public autofill::PersonalDataManagerObserver,
+                               public ProfileSyncServiceObserver {
  public:
   AutofillOptionsHandler();
   ~AutofillOptionsHandler() override;
@@ -38,6 +41,9 @@ class AutofillOptionsHandler : public OptionsPageUIHandler,
   // PersonalDataManagerObserver implementation.
   void OnPersonalDataChanged() override;
 
+  // ProfileSyncServiceObserver implementation.
+  void OnStateChanged() override;
+
  private:
   FRIEND_TEST_ALL_PREFIXES(AutofillOptionsHandlerTest, AddressToDictionary);
 
@@ -110,6 +116,9 @@ class AutofillOptionsHandler : public OptionsPageUIHandler,
   // Unowned pointer, may not be NULL.
   autofill::PersonalDataManager* personal_data_;
 
+  ScopedObserver<ProfileSyncService, ProfileSyncServiceBase::Observer>
+      observer_;
+
   DISALLOW_COPY_AND_ASSIGN(AutofillOptionsHandler);
 };