IDBObserver: Lifetime Management: Adding Observer

content/child/indexed_db/webidbdatabase_impl.h

Index: content/child/indexed_db/webidbdatabase_impl.h
diff --git a/content/child/indexed_db/webidbdatabase_impl.h b/content/child/indexed_db/webidbdatabase_impl.h
index 7d214bbd6c51f50ea8c7e7aeab5b3c6f8c7f530b..957e620da153bae0a3e60311e23b54d3b1c4142a 100644
--- a/content/child/indexed_db/webidbdatabase_impl.h
+++ b/content/child/indexed_db/webidbdatabase_impl.h
@@ -13,6 +13,7 @@
 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBTypes.h"
 
 namespace blink {
+class IDBObserver;
 class WebBlobInfo;
 class WebIDBCallbacks;
 class WebIDBDatabaseCallbacks;
@@ -45,6 +46,9 @@ class WebIDBDatabaseImpl : public blink::WebIDBDatabase {
   void close() override;
   void versionChangeIgnored() override;
 
+  void observe(blink::IDBObserver* observer, long long transactionId) override;
+  void unobserve(blink::IDBObserver* observer) override;
+
   void get(long long transactionId,
            long long objectStoreId,
            long long indexId,
@@ -114,6 +118,7 @@ class WebIDBDatabaseImpl : public blink::WebIDBDatabase {
   int32_t ipc_database_id_;
   int32_t ipc_database_callbacks_id_;
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
+  std::vector<int32_t> observers_id_;
 };
 
 }  // namespace content