mac: Only show the access Address Book prompt a fixed number of times.

components/autofill/core/browser/personal_data_manager.h

Index: components/autofill/core/browser/personal_data_manager.h
diff --git a/components/autofill/core/browser/personal_data_manager.h b/components/autofill/core/browser/personal_data_manager.h
index 570cf59d241861384beb2f83c2e4ea82c8eae9be..a539c5f8f2cf553bbb85aed49314fe0c4a8f1f00 100644
--- a/components/autofill/core/browser/personal_data_manager.h
+++ b/components/autofill/core/browser/personal_data_manager.h
@@ -211,6 +211,12 @@ class PersonalDataManager : public KeyedService,
   // grant Chrome access to the user's address book.
   bool ShouldShowAccessAddressBookSuggestion(AutofillType type);
 
+  // The access Address Book prompt was shown for a form.
+  void ShowedAccessAddressBookPrompt();
+
+  // The number of times that the access address book prompt was shown.
+  int AccessAddressBookPromptCount();
+
   // The Chrome binary is in the process of being changed, or has been changed.
   // Future attempts to access the Address Book might incorrectly present a
   // blocking dialog.