[IndexedDB] Adding transaction and value support to observers

content/child/indexed_db/indexed_db_callbacks_impl.h

 // Copyright 2016 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_CHILD_INDEXED_DB_INDEXED_DB_CALLBACKS_IMPL_H_
 #define CONTENT_CHILD_INDEXED_DB_INDEXED_DB_CALLBACKS_IMPL_H_
 
 #include "content/common/indexed_db/indexed_db.mojom.h"
 #include "mojo/public/cpp/bindings/associated_binding.h"
 
 namespace blink {
 class WebIDBCallbacks;
+struct WebIDBValue;
 }
 
 namespace content {
 
 class WebIDBCursorImpl;
 
 // Implements the child-process end of the pipe used to deliver callbacks. It
 // is owned by the IO thread. |callback_runner_| is used to post tasks back to
 // the thread which owns the blink::WebIDBCallbacks.
 class IndexedDBCallbacksImpl : public indexed_db::mojom::Callbacks {
@@ skipping 38 matching lines @@
 
    private:
     std::unique_ptr<blink::WebIDBCallbacks> callbacks_;
     int64_t transaction_id_;
     base::WeakPtr<WebIDBCursorImpl> cursor_;
     scoped_refptr<base::SingleThreadTaskRunner> io_runner_;
 
     DISALLOW_COPY_AND_ASSIGN(InternalState);
   };
 
+  static void ConvertValue(const indexed_db::mojom::ValuePtr& value,
+                           blink::WebIDBValue* web_value);
+
   IndexedDBCallbacksImpl(std::unique_ptr<blink::WebIDBCallbacks> callbacks,
                          int64_t transaction_id,
                          const base::WeakPtr<WebIDBCursorImpl>& cursor,
                          scoped_refptr<base::SingleThreadTaskRunner> io_runner);
   ~IndexedDBCallbacksImpl() override;
 
   // indexed_db::mojom::Callbacks implementation:
   void Error(int32_t code, const base::string16& message) override;
   void SuccessStringList(const std::vector<base::string16>& value) override;
   void Blocked(int64_t existing_version) override;
@@ skipping 29 matching lines @@
   // executes tasks and must be destroyed there.
   InternalState* internal_state_;
   scoped_refptr<base::SingleThreadTaskRunner> callback_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBCallbacksImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_INDEXED_DB_INDEXED_DB_CALLBACKS_IMPL_H_