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diff --git a/Source/WebKit/chromium/src/IDBObjectStoreBackendProxy.cpp b/Source/WebKit/chromium/src/IDBObjectStoreBackendProxy.cpp
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+++ b/Source/WebKit/chromium/src/IDBObjectStoreBackendProxy.cpp
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2011 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
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "IDBObjectStoreBackendProxy.h"
+
+#if ENABLE(INDEXED_DATABASE)
+
+#include "DOMStringList.h"
+#include "IDBCallbacks.h"
+#include "IDBIndexBackendProxy.h"
+#include "IDBKeyRange.h"
+#include "IDBTransactionBackendProxy.h"
+#include "WebIDBCallbacksImpl.h"
+#include "WebIDBKeyRange.h"
+#include "WebIDBIndex.h"
+#include "WebIDBKey.h"
+#include "WebIDBObjectStore.h"
+#include "WebIDBTransactionImpl.h"
+#include "WebSerializedScriptValue.h"
+
+using namespace WebCore;
+
+namespace WebKit {
+
+PassRefPtr<IDBObjectStoreBackendInterface> IDBObjectStoreBackendProxy::create(PassOwnPtr<WebIDBObjectStore> objectStore)
+{
+    return adoptRef(new IDBObjectStoreBackendProxy(objectStore));
+}
+
+IDBObjectStoreBackendProxy::IDBObjectStoreBackendProxy(PassOwnPtr<WebIDBObjectStore> objectStore)
+    : m_webIDBObjectStore(objectStore)
+{
+}
+
+IDBObjectStoreBackendProxy::~IDBObjectStoreBackendProxy()
+{
+}
+
+String IDBObjectStoreBackendProxy::name() const
+{
+    return m_webIDBObjectStore->name();
+}
+
+String IDBObjectStoreBackendProxy::keyPath() const
+{
+    return m_webIDBObjectStore->keyPath();
+}
+
+PassRefPtr<DOMStringList> IDBObjectStoreBackendProxy::indexNames() const
+{
+    return m_webIDBObjectStore->indexNames();
+}
+
+void IDBObjectStoreBackendProxy::get(PassRefPtr<IDBKey> key, PassRefPtr<IDBCallbacks> callbacks, IDBTransactionBackendInterface* transaction, ExceptionCode& ec)
+{
+    // The transaction pointer is guaranteed to be a pointer to a proxy object as, in the renderer,
+    // all implementations of IDB interfaces are proxy objects.
+    IDBTransactionBackendProxy* transactionProxy = static_cast<IDBTransactionBackendProxy*>(transaction);
+    m_webIDBObjectStore->get(key, new WebIDBCallbacksImpl(callbacks), *transactionProxy->getWebIDBTransaction(), ec);
+}
+
+void IDBObjectStoreBackendProxy::put(PassRefPtr<SerializedScriptValue> value, PassRefPtr<IDBKey> key, PutMode putMode, PassRefPtr<IDBCallbacks> callbacks, IDBTransactionBackendInterface* transaction, ExceptionCode& ec)
+{
+    // The transaction pointer is guaranteed to be a pointer to a proxy object as, in the renderer,
+    // all implementations of IDB interfaces are proxy objects.
+    IDBTransactionBackendProxy* transactionProxy = static_cast<IDBTransactionBackendProxy*>(transaction);
+    m_webIDBObjectStore->put(value, key, static_cast<WebIDBObjectStore::PutMode>(putMode), new WebIDBCallbacksImpl(callbacks), *transactionProxy->getWebIDBTransaction(), ec);
+}
+
+void IDBObjectStoreBackendProxy::deleteFunction(PassRefPtr<IDBKey> key, PassRefPtr<IDBCallbacks> callbacks, IDBTransactionBackendInterface* transaction, ExceptionCode& ec)
+{
+    // The transaction pointer is guaranteed to be a pointer to a proxy object as, in the renderer,
+    // all implementations of IDB interfaces are proxy objects.
+    IDBTransactionBackendProxy* transactionProxy = static_cast<IDBTransactionBackendProxy*>(transaction);
+    m_webIDBObjectStore->deleteFunction(key, new WebIDBCallbacksImpl(callbacks), *transactionProxy->getWebIDBTransaction(), ec);
+}
+
+void IDBObjectStoreBackendProxy::clear(PassRefPtr<IDBCallbacks> callbacks, IDBTransactionBackendInterface* transaction, ExceptionCode& ec)
+{
+    // The transaction pointer is guaranteed to be a pointer to a proxy object as, in the renderer,
+    // all implementations of IDB interfaces are proxy objects.
+    IDBTransactionBackendProxy* transactionProxy = static_cast<IDBTransactionBackendProxy*>(transaction);
+    m_webIDBObjectStore->clear(new WebIDBCallbacksImpl(callbacks), *transactionProxy->getWebIDBTransaction(), ec);
+}
+
+PassRefPtr<IDBIndexBackendInterface> IDBObjectStoreBackendProxy::createIndex(const String& name, const String& keyPath, bool unique, IDBTransactionBackendInterface* transaction, ExceptionCode& ec)
+{
+    // The transaction pointer is guaranteed to be a pointer to a proxy object as, in the renderer,
+    // all implementations of IDB interfaces are proxy objects.
+    IDBTransactionBackendProxy* transactionProxy = static_cast<IDBTransactionBackendProxy*>(transaction);
+    WebIDBIndex* index = m_webIDBObjectStore->createIndex(name, keyPath, unique, *transactionProxy->getWebIDBTransaction(), ec);
+    if (!index)
+        return 0;
+    return IDBIndexBackendProxy::create(index);
+}
+
+PassRefPtr<IDBIndexBackendInterface> IDBObjectStoreBackendProxy::index(const String& name, ExceptionCode& ec)
+{
+    WebIDBIndex* index = m_webIDBObjectStore->index(name, ec);
+    if (!index)
+        return 0;
+    return IDBIndexBackendProxy::create(index);
+}
+
+void IDBObjectStoreBackendProxy::deleteIndex(const String& name, IDBTransactionBackendInterface* transaction, ExceptionCode& ec)
+{
+    // The transaction pointer is guaranteed to be a pointer to a proxy object as, in the renderer,
+    // all implementations of IDB interfaces are proxy objects.
+    IDBTransactionBackendProxy* transactionProxy = static_cast<IDBTransactionBackendProxy*>(transaction);
+    m_webIDBObjectStore->deleteIndex(name, *transactionProxy->getWebIDBTransaction(), ec);
+}
+
+void IDBObjectStoreBackendProxy::openCursor(PassRefPtr<IDBKeyRange> range, unsigned short direction, PassRefPtr<IDBCallbacks> callbacks, IDBTransactionBackendInterface* transaction, ExceptionCode& ec)
+{
+    // The transaction pointer is guaranteed to be a pointer to a proxy object as, in the renderer,
+    // all implementations of IDB interfaces are proxy objects.
+    IDBTransactionBackendProxy* transactionProxy = static_cast<IDBTransactionBackendProxy*>(transaction);
+    m_webIDBObjectStore->openCursor(range, direction, new WebIDBCallbacksImpl(callbacks), *transactionProxy->getWebIDBTransaction(), ec);
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(INDEXED_DATABASE)