IndexedDB: Measure the total database open time.

content/browser/indexed_db/indexed_db_callbacks.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CALLBACKS_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CALLBACKS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 88 matching lines @@
   // IndexedDBDatabase::Count
   // IndexedDBFactory::DeleteDatabase
   virtual void OnSuccess(int64 value);
 
   // IndexedDBDatabase::Delete
   // IndexedDBCursor::Continue / Advance (when complete)
   virtual void OnSuccess();
 
   blink::WebIDBDataLoss data_loss() const { return data_loss_; }
 
+  void SetConnectionOpenStartTime(const base::TimeTicks& start_time);
+
  protected:
   virtual ~IndexedDBCallbacks();
 
  private:
   void RegisterBlobsAndSend(const std::vector<IndexedDBBlobInfo>& blob_info,
                             const base::Closure& callback);
 
   friend class base::RefCounted<IndexedDBCallbacks>;
 
   // Originally from IndexedDBCallbacks:
   scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
   int32 ipc_callbacks_id_;
   int32 ipc_thread_id_;
 
   // IndexedDBCursor callbacks ------------------------
   int32 ipc_cursor_id_;
 
   // IndexedDBDatabase callbacks ------------------------
   int64 host_transaction_id_;
   GURL origin_url_;
   int32 ipc_database_id_;
   int32 ipc_database_callbacks_id_;
 
   // Stored in OnDataLoss, merged with OnUpgradeNeeded response.
   blink::WebIDBDataLoss data_loss_;
   std::string data_loss_message_;
 
   // The "blocked" event should be sent at most once per request.
   bool sent_blocked_;
+  base::TimeTicks conn_open_start_time_;

[jsbell, 2014/08/18 18:25:50]

nit: Avoid uncommon abbreviations in names (sorry, makes it very long)

   DISALLOW_COPY_AND_ASSIGN(IndexedDBCallbacks);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CALLBACKS_H_