Support serving offline page by offline ID

components/offline_pages/offline_page_model_impl.h

Index: components/offline_pages/offline_page_model_impl.h
diff --git a/components/offline_pages/offline_page_model_impl.h b/components/offline_pages/offline_page_model_impl.h
index 9cdd627467b8af367d024a53f9a1a2eae13da92d..05f3660a01bf5d2bd31ee7fa1d955be4d435257e 100644
--- a/components/offline_pages/offline_page_model_impl.h
+++ b/components/offline_pages/offline_page_model_impl.h
@@ -34,6 +34,7 @@
 
 class GURL;
 namespace base {
+class Clock;
 class SequencedTaskRunner;
 class Time;
 class TimeDelta;
@@ -114,6 +115,7 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
 
   // Methods for testing only:
   OfflinePageMetadataStore* GetStoreForTesting();
+  void SetClockForTesting(std::unique_ptr<base::Clock> clock);
 
   OfflinePageStorageManager* GetStorageManager();
 
@@ -300,6 +302,9 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
   // Logger to facilitate recording of events.
   OfflinePageModelEventLogger offline_event_logger_;
 
+  // Clock for getting time.
+  std::unique_ptr<base::Clock> clock_;
+
   base::WeakPtrFactory<OfflinePageModelImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageModelImpl);