Implement throttling logic for fetching affiliation information.

components/password_manager/core/browser/affiliation_fetch_throttler_delegate.h

+// Copyright 2015 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.
+
+#ifndef COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_FETCH_THROTTLER_DELEGATE_H_
+#define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_FETCH_THROTTLER_DELEGATE_H_
+
+namespace password_manager {
+
+// An interface that users of AffiliationFetchThrottler need to implement to get
+// notified once it is okay to issue the next network request.
+class AffiliationFetchThrottlerDelegate {
+ public:
+  // Will be called once the throttling policy allows issuing a network request,
+  // provided SignalNetworkRequestNeeded() has been called at least once since
+  // the last request.
+  //
+  // The implementation must return true if a request was actually issued in
+  // response to this call, and then call InformOfNetworkRequestComplete() once
+  // the request is complete. Otherwise, the implementation must return false.
+  virtual bool OnCanSendNetworkRequest() = 0;
+
+ protected:
+  virtual ~AffiliationFetchThrottlerDelegate() {}
+};
+
+}  // namespace password_manager
+
+#endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_FETCH_THROTTLER_DELEGATE_H_