Return number of values deleted by IDBObjectStore.delete(range)

content/browser/indexed_db/leveldb/leveldb_transaction.h

Index: content/browser/indexed_db/leveldb/leveldb_transaction.h
diff --git a/content/browser/indexed_db/leveldb/leveldb_transaction.h b/content/browser/indexed_db/leveldb/leveldb_transaction.h
index 988506fac5e6d0f0079651a731d46c32c7da3a35..b14cae15ce3bc0070749addb2225062981bb8c99 100644
--- a/content/browser/indexed_db/leveldb/leveldb_transaction.h
+++ b/content/browser/indexed_db/leveldb/leveldb_transaction.h
@@ -26,7 +26,10 @@ class CONTENT_EXPORT LevelDBTransaction
     : public base::RefCounted<LevelDBTransaction> {
  public:
   void Put(const base::StringPiece& key, std::string* value);
-  void Remove(const base::StringPiece& key);
+
+  // Returns true if the record was deleted, and false if it was already
+  // deleted.

[jsbell, 2016/05/20 19:34:51]

already deleted or not present?

[palakj1, 2016/05/23 17:17:40]

Remove returns true if a new delete record is inserted or an existing record is
deleted.
If the record has already been marked as deleted, false is returned

+  bool Remove(const base::StringPiece& key);
   virtual leveldb::Status Get(const base::StringPiece& key,
                               std::string* value,
                               bool* found);
@@ -129,8 +132,8 @@ class CONTENT_EXPORT LevelDBTransaction
 
     DISALLOW_COPY_AND_ASSIGN(TransactionIterator);
   };
-
-  void Set(const base::StringPiece& key, std::string* value, bool deleted);
+  // Returns true if the key was originally marked deleted, false otherwise

[jsbell, 2016/05/20 19:34:51]

Nit: period at end of comment.

[palakj1, 2016/05/23 17:17:40]

Done

+  bool Set(const base::StringPiece& key, std::string* value, bool deleted);
   void Clear();
   void RegisterIterator(TransactionIterator* iterator);
   void UnregisterIterator(TransactionIterator* iterator);