Provide API in RequestCoordinator to remove results by client ID.

components/offline_pages/background/request_queue.cc

Index: components/offline_pages/background/request_queue.cc
diff --git a/components/offline_pages/background/request_queue.cc b/components/offline_pages/background/request_queue.cc
index f3cae845b337e01f720fb779c92154c2ff89bd3b..b33a20f91d9a07e52fba4a023dcd639128e3e06f 100644
--- a/components/offline_pages/background/request_queue.cc
+++ b/components/offline_pages/background/request_queue.cc
@@ -135,6 +135,15 @@ void RequestQueue::RemoveRequest(int64_t request_id,
   store_->RemoveRequests(request_ids, base::Bind(RemoveRequestDone, callback));
 }
 
+  // Removes the request matching each id in |client_ids|. Result is returned
+  // through |callback|.
+void RequestQueue::RemoveRequestsByClientId(
+    const std::vector<ClientId>& client_ids,
+    const UpdateRequestCallback& callback) {
+  store_->RemoveRequestsByClientId(
+      client_ids, base::Bind(RemoveRequestDone, callback));
+}
+
 void RequestQueue::PurgeRequests(const PurgeRequestsCallback& callback) {}
 
 }  // namespace offline_pages