IndexedDB: Optimize IDBCursor.advance() if it occurs within prefetched range

content/child/thread_safe_sender.h

Index: content/child/thread_safe_sender.h
diff --git a/content/child/thread_safe_sender.h b/content/child/thread_safe_sender.h
index c399915ad9660eb55c1c23c86dc0bae79df5c96b..71e7c0817f9c48e49ad2f04bf65cc3c4e20202bd 100644
--- a/content/child/thread_safe_sender.h
+++ b/content/child/thread_safe_sender.h
@@ -30,9 +30,9 @@ class CONTENT_EXPORT ThreadSafeSender
 
  private:
   friend class ChildThread;  // for construction
+  friend class WebIDBCursorImplTest;
   friend class base::RefCountedThreadSafe<ThreadSafeSender>;
   FRIEND_TEST_ALL_PREFIXES(IndexedDBDispatcherTest, ValueSizeTest);
-  FRIEND_TEST_ALL_PREFIXES(WebIDBCursorImplTest, PrefetchTest);
 
   ThreadSafeSender(base::MessageLoopProxy* main_loop,
                    IPC::SyncMessageFilter* sync_filter);