Add unit tests for the Background Scheduler.

components/offline_pages/background/request_picker.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_PICKER_H_
 #define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_PICKER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "components/offline_pages/background/request_coordinator.h"
 #include "components/offline_pages/background/request_queue.h"
 
 namespace offline_pages {
-
 class RequestPicker {
  public:
   RequestPicker(RequestQueue* requestQueue);
 
   ~RequestPicker();
 
   // Choose which request we should process next based on the current
   // conditions, and call back to the RequestCoordinator when we have one.
   void ChooseNextRequest(
       RequestCoordinator::RequestPickedCallback picked_callback,
@@ skipping 10 matching lines @@
   RequestCoordinator::RequestPickedCallback picked_callback_;
   // Callback for when there are no more reqeusts to pick.
   RequestCoordinator::RequestQueueEmptyCallback empty_callback_;
   // Allows us to pass a weak pointer to callbacks.
   base::WeakPtrFactory<RequestPicker> weak_ptr_factory_;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_PICKER_H_