IndexedDB: Remove unused plumbing for string version changes

content/browser/in_process_webkit/indexed_db_database_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_IN_PROCESS_WEBKIT_INDEXED_DB_DATABASE_CALLBACKS_H_
 #define CONTENT_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_DATABASE_CALLBACKS_H_
 
 #include "base/memory/ref_counted.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBDatabaseCallbacks.h"
 
 namespace content {
 class IndexedDBDispatcherHost;
 
 class IndexedDBDatabaseCallbacks : public WebKit::WebIDBDatabaseCallbacks {
  public:
   IndexedDBDatabaseCallbacks(IndexedDBDispatcherHost* dispatcher_host,
                              int ipc_thread_id,
                              int ipc_database_id);
 
   virtual ~IndexedDBDatabaseCallbacks();
 
   virtual void onForcedClose();
   virtual void onVersionChange(long long old_version,
                                long long new_version);
-  virtual void onVersionChange(const WebKit::WebString& requested_version);
-
   virtual void onAbort(long long host_transaction_id,
                        const WebKit::WebIDBDatabaseError&);
   virtual void onComplete(long long host_transaction_id);
 
  private:
   scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
   int ipc_thread_id_;
   int ipc_database_id_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_DATABASE_CALLBACKS_H_