IndexedDB: chromium side of IDBCursor.advance().

content/common/indexed_db/proxy_webidbcursor_impl.cc

 // 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.
 
 #include "content/common/indexed_db/proxy_webidbcursor_impl.h"
 
 #include "content/common/child_thread.h"
 #include "content/common/indexed_db/indexed_db_messages.h"
 #include "content/common/indexed_db/indexed_db_dispatcher.h"
 
@@ skipping 43 matching lines @@
 
 void RendererWebIDBCursorImpl::update(const WebSerializedScriptValue& value,
                                       WebIDBCallbacks* callbacks,
                                       WebExceptionCode& ec) {
   IndexedDBDispatcher* dispatcher =
       IndexedDBDispatcher::ThreadSpecificInstance();
   dispatcher->RequestIDBCursorUpdate(
       content::SerializedScriptValue(value), callbacks, idb_cursor_id_, &ec);
 }
 
+void RendererWebIDBCursorImpl::advance(unsigned long count,
+                                       WebIDBCallbacks* callbacks_ptr,
+                                       WebExceptionCode& ec) {
+  IndexedDBDispatcher* dispatcher =
+      IndexedDBDispatcher::ThreadSpecificInstance();
+  scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
+  ResetPrefetchCache();
+  dispatcher->RequestIDBCursorAdvance(count, callbacks.release(),
+                                      idb_cursor_id_, &ec);
+}
+
 void RendererWebIDBCursorImpl::continueFunction(const WebIDBKey& key,
                                                 WebIDBCallbacks* callbacks_ptr,
                                                 WebExceptionCode& ec) {
   IndexedDBDispatcher* dispatcher =
       IndexedDBDispatcher::ThreadSpecificInstance();
   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 
   if (key.type() == WebIDBKey::NullType) {
     // No key, so this would qualify for a prefetch.
     ++continue_count_;
@@ skipping 100 matching lines @@
       IndexedDBDispatcher::ThreadSpecificInstance();
   dispatcher->RequestIDBCursorPrefetchReset(used_prefetches_,
                                             prefetch_keys_.size(),
                                             idb_cursor_id_);
   prefetch_keys_.clear();
   prefetch_primary_keys_.clear();
   prefetch_values_.clear();
 
   pending_onsuccess_callbacks_ = 0;
 }