[IndexedDB] Propogating changes to observers : Renderer

content/browser/indexed_db/indexed_db_transaction.h

Index: content/browser/indexed_db/indexed_db_transaction.h
diff --git a/content/browser/indexed_db/indexed_db_transaction.h b/content/browser/indexed_db/indexed_db_transaction.h
index e889d4389ebb2780278c1a0d38b313dccf8b4ecf..473cb801aff1d819922fec91054c5a55125a07cb 100644
--- a/content/browser/indexed_db/indexed_db_transaction.h
+++ b/content/browser/indexed_db/indexed_db_transaction.h
@@ -28,11 +28,15 @@ namespace content {
 class BlobWriteCallbackImpl;
 class IndexedDBCursor;
 class IndexedDBDatabaseCallbacks;
+class IndexedDBObservation;
 class IndexedDBObserver;
+class IndexedDBObserverChanges;
 
 class CONTENT_EXPORT IndexedDBTransaction
     : public NON_EXPORTED_BASE(base::RefCounted<IndexedDBTransaction>) {
  public:
+  //  using Changes = IndexedDBDatabase::Changes;
+
   typedef base::Callback<void(IndexedDBTransaction*)> Operation;
 
   enum State {
@@ -69,6 +73,12 @@ class CONTENT_EXPORT IndexedDBTransaction
   // Delete pending observers with ID's listed in |pending_observer_ids|.
   void RemovePendingObservers(const std::vector<int32_t>& pending_observer_ids);
 
+  // Adds observation for the connection.
+  void AddObservation(int32_t connection_id,
+                      std::unique_ptr<IndexedDBObservation>);
+  // Adds observation index to observer_id of connection_id.
+  void AddObservationIndex(int32_t observer_id, int32_t connection_id);

[dmurph, 2016/07/08 18:40:44]

This is confusing to me. Maybe change the name like above, to specify you're
recording for the last observation added.

[palakj1, 2016/07/08 22:17:54]

Done.

+
   IndexedDBBackingStore::Transaction* BackingStoreTransaction() {
     return transaction_.get();
   }
@@ -144,6 +154,10 @@ class CONTENT_EXPORT IndexedDBTransaction
   // Observers in pending queue do not listen to changes until activated.
   std::vector<std::unique_ptr<IndexedDBObserver>> pending_observers_;
 
+  typedef std::map<int32_t, std::unique_ptr<IndexedDBObserverChanges>>
+      ConnectionChangeMap;
+  ConnectionChangeMap connection_changes_map_;
+
   class TaskQueue {
    public:
     TaskQueue();