Add foundation for trimming the AffiliationDatabase.

components/password_manager/core/browser/password_store.h

Index: components/password_manager/core/browser/password_store.h
diff --git a/components/password_manager/core/browser/password_store.h b/components/password_manager/core/browser/password_store.h
index 74ff469f51d9c978af08b50f22be4882832baa7a..c148a5f632c370b682da89ad2e6ed205ce80e71b 100644
--- a/components/password_manager/core/browser/password_store.h
+++ b/components/password_manager/core/browser/password_store.h
@@ -93,14 +93,20 @@ class PasswordStore : protected PasswordStoreSync,
   // Removes the matching PasswordForm from the secure password store (async).
   virtual void RemoveLogin(const autofill::PasswordForm& form);
 
-  // Removes all logins created in the given date range.
+  // Removes all logins created in the given date range, and posts |completion|,
+  // if non-null, to the |main_thread_runner_| once done.
   virtual void RemoveLoginsCreatedBetween(base::Time delete_begin,
-                                          base::Time delete_end);
+                                          base::Time delete_end,
+                                          const base::Closure& completion);
 
   // Removes all logins synced in the given date range.
   virtual void RemoveLoginsSyncedBetween(base::Time delete_begin,
                                          base::Time delete_end);
 
+  // Removes cached affiliation data that is no longer needed; provided that
+  // affiliation-based matching is enabled.
+  void TrimAffiliationCache();
+
   // Searches for a matching PasswordForm, and notifies |consumer| on
   // completion. The request will be cancelled if the consumer is destroyed.
   // |prompt_policy| indicates whether it's permissible to prompt the user to
@@ -284,7 +290,8 @@ class PasswordStore : protected PasswordStoreSync,
   void UpdateLoginInternal(const autofill::PasswordForm& form);
   void RemoveLoginInternal(const autofill::PasswordForm& form);
   void RemoveLoginsCreatedBetweenInternal(base::Time delete_begin,
-                                          base::Time delete_end);
+                                          base::Time delete_end,
+                                          const base::Closure& completion);
   void RemoveLoginsSyncedBetweenInternal(base::Time delete_begin,
                                          base::Time delete_end);