Support to remove passwords by date_synced timestamp.

chrome/browser/password_manager/password_store_x.cc

Index: chrome/browser/password_manager/password_store_x.cc
diff --git a/chrome/browser/password_manager/password_store_x.cc b/chrome/browser/password_manager/password_store_x.cc
index 8a6fc746d4f276041f6d66dadd272219c1f7412b..2fbe63c8a03f8916aae9f349cafe54f9d149c0b1 100644
--- a/chrome/browser/password_manager/password_store_x.cc
+++ b/chrome/browser/password_manager/password_store_x.cc
@@ -110,6 +110,21 @@ PasswordStoreChangeList PasswordStoreX::RemoveLoginsCreatedBetweenImpl(
   return changes;
 }
 
+PasswordStoreChangeList PasswordStoreX::RemoveLoginsSyncedBetweenImpl(
+    base::Time delete_begin,
+    base::Time delete_end) {
+  CheckMigration();
+  PasswordStoreChangeList changes;
+  if (use_native_backend() &&
+      backend_->RemoveLoginsSyncedBetween(delete_begin, delete_end, &changes)) {
+    allow_fallback_ = false;
+  } else if (allow_default_store()) {
+    changes = PasswordStoreDefault::RemoveLoginsSyncedBetweenImpl(delete_begin,
+                                                                  delete_end);
+  }
+  return changes;
+}
+
 namespace {
 struct LoginLessThan {
   bool operator()(const PasswordForm* a, const PasswordForm* b) {