[Offline Pages] Add evaluation test support in RequestCoordinator.

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 <set>
 #include <vector>
@@ skipping 119 matching lines @@
   void MarkRequestCompleted(int64_t request_id);
 
   const Scheduler::TriggerConditions GetTriggerConditions(
       const bool user_requested);
 
   // A way for tests to set the callback in use when an operation is over.
   void SetProcessingCallbackForTest(const base::Callback<void(bool)> callback) {
     scheduler_callback_ = callback;
   }
 
+  // A way to set the callback which would be called if the request is an
+  // user-requested one. Used by testing harness to determine if a request has
+  // been processed.
+  void SetUserRequestCallbackForTest(
+      const base::Callback<void(bool)> callback) {
+    user_request_callback_ = callback;
+  }
+
   // Observers implementing the RequestCoordinator::Observer interface can
   // register here to get notifications of changes to request state.  This
   // pointer is not owned, and it is the callers responsibility to remove the
   // observer before the observer is deleted.
   void AddObserver(RequestCoordinator::Observer* observer);
 
   void RemoveObserver(RequestCoordinator::Observer* observer);
 
   // Implement RequestNotifier
   void NotifyAdded(const SavePageRequest& request) override;
@@ skipping 210 matching lines @@
   std::unique_ptr<RequestPicker> picker_;
   // A set of request_ids that we are holding off until the download manager is
   // done with them.
   std::set<int64_t> disabled_requests_;
   // Calling this returns to the scheduler across the JNI bridge.
   base::Callback<void(bool)> scheduler_callback_;
   // Logger to record events.
   RequestCoordinatorEventLogger event_logger_;
   // Timer to watch for pre-render attempts running too long.
   base::OneShotTimer watchdog_timer_;
+  // Callback invoked when a user request is done (default empty).
+  base::Callback<void(bool)> user_request_callback_;
   // 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_