Adds request queue removal capability to OfflinePageBridge.

components/offline_pages/background/request_coordinator.h

 // 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.
 
 #ifndef COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_
 #define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 47 matching lines @@
                      std::unique_ptr<RequestQueue> queue,
                      std::unique_ptr<Scheduler> scheduler);
 
   ~RequestCoordinator() override;
 
   // Queues |request| to later load and save when system conditions allow.
   // Returns true if the page could be queued successfully.
   bool SavePageLater(
       const GURL& url, const ClientId& client_id, bool user_reqeusted);
 
+  // Callback specifying which request IDs were actually removed.
+  typedef base::Callback<void(const std::vector<SavePageRequest>&)>
+      RequestsRemovedCallback;
+
   // Remove a list of requests by |request_id|.  This removes requests from the
   // request queue, but does not cancel an in-progress pre-render.
   // TODO(petewil): Add code to cancel an in-progress pre-render.
-  void RemoveRequests(const std::vector<int64_t>& request_ids);
+  void RemoveRequests(const std::vector<int64_t>& request_ids,
+                      const RequestsRemovedCallback& callback);
 
   // Pause a list of requests by |request_id|.  This will change the state
   // in the request queue so the request cannot be started.
   // TODO(petewil): Add code to cancel an in-progress pre-render.
   void PauseRequests(const std::vector<int64_t>& request_ids);
 
   // Resume a list of previously paused requests, making them available.
   void ResumeRequests(const std::vector<int64_t>& request_ids);
 
   // Callback that receives the response for GetAllRequests.  Client must
@@ skipping 75 matching lines @@
                                 const SavePageRequest& request);
 
   // Receives the result of update and delete requests to the request queue.
   void UpdateRequestCallback(const ClientId& client_id,
                              RequestQueue::UpdateRequestResult result);
 
   void UpdateMultipleRequestsCallback(
       const RequestQueue::UpdateMultipleRequestResults& result,
       const std::vector<SavePageRequest>& requests);
 
+  void ExplicitlyRemoveRequestsCallback(
+      const RequestsRemovedCallback& callback,
+      const RequestQueue::UpdateMultipleRequestResults& results,
+      const std::vector<SavePageRequest>& requests);
+
   void RemoveRequestsCallback(
       const RequestQueue::UpdateMultipleRequestResults& results,
       const std::vector<SavePageRequest>& requests);
 
   // Callback from the request picker when it has chosen our next request.
   void RequestPicked(const SavePageRequest& request);
 
   // Callback from the request picker when no more requests are in the queue.
   void RequestQueueEmpty();
 
@@ skipping 57 matching lines @@
   base::TimeDelta offliner_timeout_;
   // Allows us to pass a weak pointer to callbacks.
   base::WeakPtrFactory<RequestCoordinator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RequestCoordinator);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_