Revert 243344 "IndexedDB: Fix cursor prefetching edge cases"

trunk/src/content/child/indexed_db/webidbcursor_impl.cc

Index: trunk/src/content/child/indexed_db/webidbcursor_impl.cc
===================================================================
--- trunk/src/content/child/indexed_db/webidbcursor_impl.cc	(revision 243358)
+++ trunk/src/content/child/indexed_db/webidbcursor_impl.cc	(working copy)
@@ -161,14 +161,6 @@
 
   ++pending_onsuccess_callbacks_;
 
-  if (!continue_count_) {
-    // The cache was invalidated by a call to ResetPrefetchCache()
-    // after the RequestIDBCursorPrefetch() was made. Now that the
-    // initiating continue() call has been satisfied, discard
-    // the rest of the cache.
-    ResetPrefetchCache();
-  }
-
   callbacks->onSuccess(WebIDBKeyBuilder::Build(key),
                        WebIDBKeyBuilder::Build(primary_key),
                        value);