Add skeletons for the factories to create the request coordinator and

components/offline_pages/background/request_coordinator.h

Index: components/offline_pages/background/request_coordinator.h
diff --git a/components/offline_pages/background/request_coordinator.h b/components/offline_pages/background/request_coordinator.h
index 47991061dba95200a826cfac6abb9289ce0d0736..fdbe868a0fcf2fda0af468dc930564cfbacf2b1d 100644
--- a/components/offline_pages/background/request_coordinator.h
+++ b/components/offline_pages/background/request_coordinator.h
@@ -6,11 +6,16 @@
 #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;
@@ -19,10 +24,7 @@ class RequestCoordinator {
     // TODO(dougarnett): define and consider making stand-alone.
   };
 
-  // TODO(dougarnett): How to inject Offliner factories and policy objects.
-  RequestCoordinator();
-
-  ~RequestCoordinator();
+  ~RequestCoordinator() override;
 
   // Queues |request| to later load and save when system conditions allow.
   bool SavePageLater(const SavePageRequest& request);
@@ -38,7 +40,16 @@ class RequestCoordinator {
   // is stopped or complete.
   void StopProcessing();
 
-  // TODO(dougarnett): add policy support methods.
+  // Factory has permission to call our private constructor.
+  friend class RequestCoordinatorFactory;
+
+ private:
+  RequestCoordinator(
+      OfflinerPolicy* policy, OfflinerFactory* factory);
+
+  OfflinerPolicy* policy_;
+  OfflinerFactory* factory_;
+  int factoryArraySize_;
 };
 
 }  // namespace offline_pages