[IndexedDB] Adding transaction and value support to observers

third_party/WebKit/Source/modules/indexeddb/IDBObserverChanges.cpp

Index: third_party/WebKit/Source/modules/indexeddb/IDBObserverChanges.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBObserverChanges.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBObserverChanges.cpp
index f3bde6ff7b7cb42783f236a299d0c5c2f8097dcd..f84e13e9d47841be6682931b521a2df34c81be60 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBObserverChanges.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBObserverChanges.cpp
@@ -32,14 +32,25 @@ IDBObserverChanges* IDBObserverChanges::create(
     IDBDatabase* database,
     const WebVector<WebIDBObservation>& observations,
     const WebVector<int32_t>& observationIndex) {
-  return new IDBObserverChanges(database, observations, observationIndex);
+  return new IDBObserverChanges(database, nullptr, observations,
+                                observationIndex);
+}
+
+IDBObserverChanges* IDBObserverChanges::create(
+    IDBDatabase* database,
+    IDBTransaction* transaction,
+    const WebVector<WebIDBObservation>& observations,
+    const WebVector<int32_t>& observationIndex) {
+  return new IDBObserverChanges(database, transaction, observations,
+                                observationIndex);
 }
 
 IDBObserverChanges::IDBObserverChanges(
     IDBDatabase* database,
+    IDBTransaction* transaction,
     const WebVector<WebIDBObservation>& observations,
     const WebVector<int32_t>& observationIndex)
-    : m_database(database) {
+    : m_database(database), m_transaction(transaction) {
   extractChanges(observations, observationIndex);
 }