Remove content/browser dependency on WebKit::WebIDBCallbacks and WebKit::WebIDBDatabaseCallbacks

content/browser/indexed_db/webidbcursor_impl.h

 // Copyright (c) 2013 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_WEBIDBCURSOR_IMPL_H_
 #define CONTENT_BROWSER_INDEXED_DB_WEBIDBCURSOR_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "third_party/WebKit/public/platform/WebIDBCursor.h"
 
 namespace content {
 class IndexedDBCursor;
+class IndexedDBCallbacksBase;
 
-class WebIDBCursorImpl : public WebKit::WebIDBCursor {
+class WebIDBCursorImpl {
  public:
   explicit WebIDBCursorImpl(scoped_refptr<IndexedDBCursor> cursor);
   virtual ~WebIDBCursorImpl();
 
-  virtual void advance(unsigned long, WebKit::WebIDBCallbacks* callbacks);
+  virtual void advance(unsigned long, IndexedDBCallbacksBase* callbacks);
   virtual void continueFunction(const WebKit::WebIDBKey& key,
-                                WebKit::WebIDBCallbacks* callbacks);
+                                IndexedDBCallbacksBase* callbacks);
   virtual void prefetchContinue(int number_to_fetch,
-                                WebKit::WebIDBCallbacks* callbacks);
+                                IndexedDBCallbacksBase* callbacks);
   virtual void prefetchReset(int used_prefetches, int unused_prefetches);
 
  private:
   scoped_refptr<IndexedDBCursor> idb_cursor_backend_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_WEBIDBCURSOR_IMPL_H_