IDBObserver: Lifetime Management: Adding Observer

content/common/indexed_db/indexed_db_messages.h

Index: content/common/indexed_db/indexed_db_messages.h
diff --git a/content/common/indexed_db/indexed_db_messages.h b/content/common/indexed_db/indexed_db_messages.h
index 68af020df66f3263d23be24d53fb28527371c7ed..977bb65887bed4e87d38a66457d6a647a17af03d 100644
--- a/content/common/indexed_db/indexed_db_messages.h
+++ b/content/common/indexed_db/indexed_db_messages.h
@@ -485,6 +485,17 @@ IPC_MESSAGE_CONTROL1(IndexedDBHostMsg_FactoryDeleteDatabase,
 IPC_MESSAGE_CONTROL1(IndexedDBHostMsg_AckReceivedBlobs,
                      std::vector<std::string>) /* uuids */
 
+// WebIDBDatabase::observe() message.
+IPC_MESSAGE_CONTROL3(IndexedDBHostMsg_DatabaseObserve,
+                     int32_t, /* ipc_database_id */
+                     int64_t, /* transaction_id */
+                     int32_t) /* observer_id */

[palmer, 2016/06/28 19:34:30]

Note that in a few places you use int64_t as the observer ID type. Standardize
on 1 (probably int32_t is fine).

[palakj1, 2016/06/29 23:02:41]

Done.

+
+// WebIDBDatabase::unobserve() message.
+IPC_MESSAGE_CONTROL2(IndexedDBHostMsg_DatabaseUnobserve,
+                     int32_t,              /* ipc_database_id */
+                     std::vector<int32_t>) /* list of observer_id */
+
 // WebIDBDatabase::createObjectStore() message.
 IPC_MESSAGE_CONTROL1(IndexedDBHostMsg_DatabaseCreateObjectStore,
                      IndexedDBHostMsg_DatabaseCreateObjectStore_Params)