Add skeletons for the factories to create the request coordinator and

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 "base/callback.h"
+#include "components/keyed_service/core/keyed_service.h"
+
 namespace offline_pages {
 
+class OfflinerPolicy;
+class OfflinerFactory;
+class Offliner;
+
 // Coordinates queueing and processing save page later requests.
-class RequestCoordinator {
+class RequestCoordinator : public KeyedService {
  public:
   // Callback to report when the processing of a triggered task is complete.
   typedef base::Callback<void()> ProcessingDoneCallback;
 
   struct SavePageRequest {
     // TODO(dougarnett): define and consider making stand-alone.
   };
 
-  // TODO(dougarnett): How to inject Offliner factories and policy objects.
-  RequestCoordinator();
+  RequestCoordinator(
+      OfflinerPolicy* policy, OfflinerFactory* factory);

[fgorski, 2016/04/29 04:16:46]

a) what about multiple factories for different offliners
b) coordinator should take ownership of this, but we need to discuss the
lifecycle of factories.

[Pete Williamson, 2016/05/02 20:51:14]

For now we only have one factory.  I have a TODO elsewhere to expand to an array
of factories once we add a second.  Until then, what we have now is simpler.

Agreed, we should discuss the lifecycle of factories.  I want to nail down the
prerenderer_factory workings before I tackle lifecycle, though.

 
-  ~RequestCoordinator() {}
+  ~RequestCoordinator() override;
 
   // Queues |request| to later load and save when system conditions allow.
   bool SavePageLater(const SavePageRequest& request);
 
   // Starts processing of one or more queued save page later requests.
   // Returns whether processing was started and that caller should expect
   // a callback. If processing was already active, returns false.
   bool StartProcessing(const ProcessingDoneCallback& callback);
 
   // Stops the current request processing if active. This is a way for
   // caller to abort processing; otherwise, processing will complete on
   // its own. In either case, the callback will be called when processing
   // is stopped or complete.
   void StopProcessing();
 
-  // TODO(dougarnett): add policy support methods.
+  // Factory has permission to call our private constructor.
+  friend class RequestCoordinatorFactory;
+
+ private:
+  OfflinerPolicy* policy_;
+  OfflinerFactory* factory_;
+  // Offliner* offlinerArray_;
+  int factoryArraySize_;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_