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diff --git a/Source/WebKit/chromium/src/AsyncFileSystemChromium.cpp b/Source/WebKit/chromium/src/AsyncFileSystemChromium.cpp
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+++ b/Source/WebKit/chromium/src/AsyncFileSystemChromium.cpp
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+/*
+ * Copyright (C) 2010 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 "AsyncFileSystemChromium.h"
+
+#if ENABLE(FILE_SYSTEM)
+
+#include "AsyncFileSystemCallbacks.h"
+#include "AsyncFileWriterChromium.h"
+#include "WebFileInfo.h"
+#include "WebFileSystem.h"
+#include "WebFileSystemCallbacksImpl.h"
+#include "WebFileWriter.h"
+#include "WebKit.h"
+#include "WebKitClient.h"
+
+#include <wtf/text/CString.h>
+
+namespace WebCore {
+
+bool AsyncFileSystem::isAvailable()
+{
+    return true;
+}
+
+AsyncFileSystemChromium::AsyncFileSystemChromium(const String& rootPath)
+    : AsyncFileSystem(rootPath)
+    , m_webFileSystem(WebKit::webKitClient()->fileSystem())
+{
+    ASSERT(m_webFileSystem);
+}
+
+AsyncFileSystemChromium::~AsyncFileSystemChromium()
+{
+}
+
+void AsyncFileSystemChromium::move(const String& sourcePath, const String& destinationPath, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->move(sourcePath, destinationPath, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+void AsyncFileSystemChromium::copy(const String& sourcePath, const String& destinationPath, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->copy(sourcePath, destinationPath, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+void AsyncFileSystemChromium::remove(const String& path, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->remove(path, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+void AsyncFileSystemChromium::removeRecursively(const String& path, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->removeRecursively(path, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+void AsyncFileSystemChromium::readMetadata(const String& path, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->readMetadata(path, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+void AsyncFileSystemChromium::createFile(const String& path, bool exclusive, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->createFile(path, exclusive, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+void AsyncFileSystemChromium::createDirectory(const String& path, bool exclusive, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->createDirectory(path, exclusive, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+void AsyncFileSystemChromium::fileExists(const String& path, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->fileExists(path, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+void AsyncFileSystemChromium::directoryExists(const String& path, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->directoryExists(path, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+void AsyncFileSystemChromium::readDirectory(const String& path, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->readDirectory(path, new WebKit::WebFileSystemCallbacksImpl(callbacks));
+}
+
+class FileWriterHelperCallbacks : public WebKit::WebFileSystemCallbacks {
+public:
+    FileWriterHelperCallbacks(AsyncFileWriterClient* client, const String& path, WebKit::WebFileSystem* webFileSystem, PassOwnPtr<WebCore::AsyncFileSystemCallbacks> callbacks)
+        : m_client(client)
+        , m_path(path)
+        , m_webFileSystem(webFileSystem)
+        , m_callbacks(callbacks)
+    {
+    }
+
+    virtual void didSucceed()
+    {
+        ASSERT_NOT_REACHED();
+        delete this;
+    }
+    virtual void didReadMetadata(const WebKit::WebFileInfo& info)
+    {
+        ASSERT(m_callbacks);
+        if (info.type != WebKit::WebFileInfo::TypeFile || info.length < 0)
+            m_callbacks->didFail(WebKit::WebFileErrorInvalidState);
+        else {
+            OwnPtr<AsyncFileWriterChromium> asyncFileWriterChromium = adoptPtr(new AsyncFileWriterChromium(m_client));
+            OwnPtr<WebKit::WebFileWriter> webFileWriter = adoptPtr(m_webFileSystem->createFileWriter(m_path, asyncFileWriterChromium.get()));
+            asyncFileWriterChromium->setWebFileWriter(webFileWriter.release());
+            m_callbacks->didCreateFileWriter(asyncFileWriterChromium.release(), info.length);
+        }
+        delete this;
+    }
+
+    virtual void didReadDirectory(const WebKit::WebVector<WebKit::WebFileSystemEntry>& entries, bool hasMore)
+    {
+        ASSERT_NOT_REACHED();
+        delete this;
+    }
+    virtual void didOpenFileSystem(const WebKit::WebString& name, const WebKit::WebString& rootPath)
+    {
+        ASSERT_NOT_REACHED();
+        delete this;
+    }
+
+    virtual void didFail(WebKit::WebFileError error)
+    {
+        ASSERT(m_callbacks);
+        m_callbacks->didFail(error);
+        delete this;
+    }
+
+private:
+    AsyncFileWriterClient* m_client;
+    String m_path;
+    WebKit::WebFileSystem* m_webFileSystem;
+    OwnPtr<WebCore::AsyncFileSystemCallbacks> m_callbacks;
+};
+
+void AsyncFileSystemChromium::createWriter(AsyncFileWriterClient* client, const String& path, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
+{
+    m_webFileSystem->readMetadata(path, new FileWriterHelperCallbacks(client, path, m_webFileSystem, callbacks));
+}
+
+} // namespace WebCore
+
+#endif