Wrap large IndexedDB values into Blobs before writing to LevelDB.

third_party/WebKit/Source/modules/indexeddb/IDBOpenDBRequest.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 28 matching lines @@
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static IDBOpenDBRequest* Create(ScriptState*,
                                   IDBDatabaseCallbacks*,
                                   int64_t transaction_id,
                                   int64_t version);
   ~IDBOpenDBRequest() override;
   DECLARE_VIRTUAL_TRACE();
 
-  using IDBRequest::EnqueueResponse;
-
   void EnqueueBlocked(int64_t existing_version) override;
   void EnqueueUpgradeNeeded(int64_t old_version,
                             std::unique_ptr<WebIDBDatabase>,
                             const IDBDatabaseMetadata&,
                             WebIDBDataLoss,
                             String data_loss_message) override;
   void EnqueueResponse(std::unique_ptr<WebIDBDatabase>,
                        const IDBDatabaseMetadata&) override;
-  void EnqueueResponse(int64_t old_version) override;
 
   // SuspendableObject
   void ContextDestroyed(ExecutionContext*) final;
 
   // EventTarget
   const AtomicString& InterfaceName() const override;
 
   DEFINE_ATTRIBUTE_EVENT_LISTENER(blocked);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(upgradeneeded);
 
  protected:
+  void EnqueueResponse(int64_t old_version) override;
+
   bool ShouldEnqueueEvent() const override;
 
   // EventTarget
   DispatchEventResult DispatchEventInternal(Event*) override;
 
  private:
   IDBOpenDBRequest(ScriptState*,
                    IDBDatabaseCallbacks*,
                    int64_t transaction_id,
                    int64_t version);
 
   Member<IDBDatabaseCallbacks> database_callbacks_;
   const int64_t transaction_id_;
   int64_t version_;
 };
 
 }  // namespace blink
 
 #endif  // IDBOpenDBRequest_h