indexeddb: make setVersion fire blocked event if other connections are open

chrome/browser/in_process_webkit/indexed_db_callbacks.h

 // Copyright (c) 2010 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 CHROME_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_CALLBACKS_H_
 #define CHROME_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_CALLBACKS_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/ref_counted.h"
@@ skipping 27 matching lines @@
 
 // The code the following two classes share.
 class IndexedDBCallbacksBase : public WebKit::WebIDBCallbacks {
  public:
   IndexedDBCallbacksBase(IndexedDBDispatcherHost* dispatcher_host,
                          int32 response_id);
 
   virtual ~IndexedDBCallbacksBase();
 
   virtual void onError(const WebKit::WebIDBDatabaseError& error);
+  virtual void onBlocked();
 
  protected:
   IndexedDBDispatcherHost* dispatcher_host() const {
     return dispatcher_host_.get();
   }
   int32 response_id() const { return response_id_; }
 
  private:
   scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
   int32 response_id_;
@@ skipping 85 matching lines @@
   virtual void onComplete();
 
   virtual void onTimeout();
 
  private:
   scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
   int transaction_id_;
 };
 
 #endif  // CHROME_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_CALLBACKS_H_