IDBObserver: Lifetime Management: Adding Observer

content/child/indexed_db/indexed_db_dispatcher.h

Index: content/child/indexed_db/indexed_db_dispatcher.h
diff --git a/content/child/indexed_db/indexed_db_dispatcher.h b/content/child/indexed_db/indexed_db_dispatcher.h
index 9e5068db7b6f12e14a3ef48bc722d0bcdf3e2093..bd040342e6863949dcb649dc8340126355d1f508 100644
--- a/content/child/indexed_db/indexed_db_dispatcher.h
+++ b/content/child/indexed_db/indexed_db_dispatcher.h
@@ -36,6 +36,7 @@ struct IndexedDBMsg_CallbacksSuccessValue_Params;
 struct IndexedDBMsg_CallbacksUpgradeNeeded_Params;
 
 namespace blink {
+class IDBObserver;
 class WebData;
 }
 
@@ -74,6 +75,12 @@ class CONTENT_EXPORT IndexedDBDispatcher : public WorkerThread::Observer {
   // This method is virtual so it can be overridden in unit tests.
   virtual bool Send(IPC::Message* msg);
 
+  int32_t AddIDBObserver(int32_t ipc_database_id,
+                         int64_t transaction_id,
+                         blink::IDBObserver* observer);
+  std::vector<int32_t> RemoveIDBObserver(int32_t ipc_database_id,
+                                         blink::IDBObserver* observer);
+
   void RequestIDBFactoryGetDatabaseNames(blink::WebIDBCallbacks* callbacks,
                                          const url::Origin& origin);
 
@@ -258,12 +265,13 @@ class CONTENT_EXPORT IndexedDBDispatcher : public WorkerThread::Observer {
   // Used by unit tests to exercise behavior without allocating huge chunks
   // of memory.
   size_t max_put_value_size_ = kMaxIDBMessageSizeInBytes;
-
   // Careful! WebIDBCallbacks wraps non-threadsafe data types. It must be
   // destroyed and used on the same thread it was created on.
   IDMap<blink::WebIDBCallbacks, IDMapOwnPointer> pending_callbacks_;
   IDMap<blink::WebIDBDatabaseCallbacks, IDMapOwnPointer>
       pending_database_callbacks_;
+  // TODO(palakj): observers_ should be IDMap<RefPtr<blink::IDBObserver>,
+  // IDMapOwnPointer> observers_.
 
   // Maps the ipc_callback_id from an open cursor request to the request's
   // transaction_id. Used to assign the transaction_id to the WebIDBCursorImpl
@@ -272,8 +280,8 @@ class CONTENT_EXPORT IndexedDBDispatcher : public WorkerThread::Observer {
 
   // Map from cursor id to WebIDBCursorImpl.
   std::map<int32_t, WebIDBCursorImpl*> cursors_;
-
   std::map<int32_t, WebIDBDatabaseImpl*> databases_;
+  std::map<int32_t, blink::IDBObserver*> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBDispatcher);
 };