[IndexedDB] Refactoring to remove ref ptrs and host transaction ids.

content/browser/indexed_db/indexed_db_callbacks.h

Index: content/browser/indexed_db/indexed_db_callbacks.h
diff --git a/content/browser/indexed_db/indexed_db_callbacks.h b/content/browser/indexed_db/indexed_db_callbacks.h
index bf26a1d436bd4eb4e24d13230298046339bd3de6..6b698b67831a2a6b2d906ae161d36f298f79322a 100644
--- a/content/browser/indexed_db/indexed_db_callbacks.h
+++ b/content/browser/indexed_db/indexed_db_callbacks.h
@@ -31,6 +31,7 @@ class IndexedDBDatabase;
 struct IndexedDBDataLossInfo;
 struct IndexedDBDatabaseMetadata;
 struct IndexedDBReturnValue;
+class IndexedDBTransaction;
 struct IndexedDBValue;
 
 class CONTENT_EXPORT IndexedDBCallbacks
@@ -53,13 +54,14 @@ class CONTENT_EXPORT IndexedDBCallbacks
   virtual void OnUpgradeNeeded(
       int64_t old_version,
       std::unique_ptr<IndexedDBConnection> connection,
+      IndexedDBTransaction* transaction,
       const content::IndexedDBDatabaseMetadata& metadata,
       const IndexedDBDataLossInfo& data_loss_info);
   virtual void OnSuccess(std::unique_ptr<IndexedDBConnection> connection,
                          const content::IndexedDBDatabaseMetadata& metadata);
 
   // IndexedDBDatabase::OpenCursor
-  virtual void OnSuccess(scoped_refptr<IndexedDBCursor> cursor,
+  virtual void OnSuccess(std::unique_ptr<IndexedDBCursor> cursor,
                          const IndexedDBKey& key,
                          const IndexedDBKey& primary_key,
                          IndexedDBValue* value);
@@ -99,10 +101,6 @@ class CONTENT_EXPORT IndexedDBCallbacks
 
   void SetConnectionOpenStartTime(const base::TimeTicks& start_time);
 
-  void set_host_transaction_id(int64_t host_transaction_id) {
-    host_transaction_id_ = host_transaction_id;
-  }
-
  protected:
   virtual ~IndexedDBCallbacks();
 
@@ -118,7 +116,6 @@ class CONTENT_EXPORT IndexedDBCallbacks
   scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
 
   // IndexedDBDatabase callbacks ------------------------
-  int64_t host_transaction_id_;
   url::Origin origin_;
   bool database_sent_ = false;