Add FormFetcher::RemoveConsumer

components/password_manager/core/browser/form_fetcher_impl_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/password_manager/core/browser/form_fetcher_impl.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 599 matching lines @@
   // Pass empty results to make the state NOT_WAITING.
   form_fetcher_->OnGetPasswordStoreResults(
       std::vector<std::unique_ptr<PasswordForm>>());
   std::vector<InteractionsStats> stats(1);
   form_fetcher_->OnGetSiteStatistics(std::move(stats));
 
   auto clone = form_fetcher_->Clone();
   EXPECT_EQ(1u, clone->GetInteractionsStats().size());
 }
 
+// Check that removing consumers stops them from receiving store updates.
+TEST_F(FormFetcherImplTest, RemoveConsumer) {
+  Fetch();
+  form_fetcher_->AddConsumer(&consumer_);
+  form_fetcher_->RemoveConsumer(&consumer_);
+  EXPECT_CALL(consumer_, ProcessMatches(_, _)).Times(0);
+  form_fetcher_->OnGetPasswordStoreResults(
+      std::vector<std::unique_ptr<PasswordForm>>());
+}
+
 }  // namespace password_manager