[IndexedDB] Adding transaction and value support to observers

content/browser/indexed_db/list_set.h

Index: content/browser/indexed_db/list_set.h
diff --git a/content/browser/indexed_db/list_set.h b/content/browser/indexed_db/list_set.h
index ab46af20d6533c1c6d57f0ea30f7acc80a7dd270..3bbd34d06a146ca5a674dce82b3ba6af283fe320 100644
--- a/content/browser/indexed_db/list_set.h
+++ b/content/browser/indexed_db/list_set.h
@@ -33,6 +33,13 @@ class list_set {
     return *this;
   }
 
+  void insert_front(const T& elem) {

[jsbell, 2017/01/13 00:14:12]

Add test case to list_set_unittest.cc ?

[dmurph, 2017/01/13 01:50:43]

Done.

+    if (set_.find(elem) != set_.end())
+      return;
+    set_.insert(elem);
+    list_.push_front(elem);
+  }
+
   void insert(const T& elem) {
     if (set_.find(elem) != set_.end())
       return;