Make the ThrottledOfflineContentProvider better

components/offline_items_collection/core/android/offline_content_aggregator_bridge.h

Index: components/offline_items_collection/core/android/offline_content_aggregator_bridge.h
diff --git a/components/offline_items_collection/core/android/offline_content_aggregator_bridge.h b/components/offline_items_collection/core/android/offline_content_aggregator_bridge.h
index 5a3a8cd071ef7753fc2b40346c7440f16891dd7c..e367edf468e188609cf88e3d45619d2004f4e1a0 100644
--- a/components/offline_items_collection/core/android/offline_content_aggregator_bridge.h
+++ b/components/offline_items_collection/core/android/offline_content_aggregator_bridge.h
@@ -15,6 +15,7 @@ namespace offline_items_collection {
 
 struct ContentId;
 struct OfflineItem;
+class ThrottledOfflineContentProvider;
 
 namespace android {
 
@@ -90,7 +91,7 @@ class OfflineContentAggregatorBridge : public OfflineContentProvider::Observer,
   // OfflineContentAggregatorBridge.java.
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
 
-  OfflineContentAggregator* const aggregator_;
+  std::unique_ptr<ThrottledOfflineContentProvider> provider_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflineContentAggregatorBridge);
 };