[IndexedDB] Adding transaction and value support to observers

third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h

Index: third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h b/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h
index 1c3a1244c7598b8e3b14232d3829eaaaf0c2b707..148d947a1dbb77e7501a808a80df645e8796b011 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h
@@ -61,6 +61,11 @@ class MODULES_EXPORT IDBTransaction final
   DEFINE_WRAPPERTYPEINFO();
 
  public:
+  static IDBTransaction* createObserver(ExecutionContext*,
+                                        int64_t,
+                                        const HashSet<String>& scope,
+                                        IDBDatabase*);
+
   static IDBTransaction* createNonVersionChange(ScriptState*,
                                                 int64_t,
                                                 const HashSet<String>& scope,
@@ -142,6 +147,12 @@ class MODULES_EXPORT IDBTransaction final
  private:
   using IDBObjectStoreMap = HeapHashMap<String, Member<IDBObjectStore>>;
 
+  // For observer transactions.
+  IDBTransaction(ExecutionContext*,
+                 int64_t,
+                 const HashSet<String>& scope,
+                 IDBDatabase*);
+
   // For non-upgrade transactions.
   IDBTransaction(ScriptState*,
                  int64_t,