Fix chrome upload with content uri

webkit/browser/blob/content_url_stream_reader_android.h

+// Copyright (c) 2013 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 WEBKIT_BROWSER_BLOB_CONTENT_URL_STREAM_READER_ANDROID_H_
+#define WEBKIT_BROWSER_BLOB_CONTENT_URL_STREAM_READER_ANDROID_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/platform_file.h"
+#include "base/time/time.h"
+#include "url/gurl.h"
+#include "webkit/browser/blob/file_stream_reader.h"
+#include "webkit/browser/webkit_storage_browser_export.h"
+
+namespace base {
+class TaskRunner;
+}
+
+namespace net {
+class FileStream;
+}
+
+namespace webkit_blob {
+
+// A thin wrapper of net::FileStream to handle content url reading.
+class WEBKIT_STORAGE_BROWSER_EXPORT ContentUrlStreamReader
+    : public NON_EXPORTED_BASE(FileStreamReader) {
+ public:
+  virtual ~ContentUrlStreamReader();
+
+  // FileStreamReader overrides.
+  virtual int Read(net::IOBuffer* buf, int buf_len,
+                   const net::CompletionCallback& callback) OVERRIDE;
+  virtual int64 GetLength(
+      const net::Int64CompletionCallback& callback) OVERRIDE;
+
+ private:
+  friend class FileStreamReader;
+
+  ContentUrlStreamReader(base::TaskRunner* task_runner,
+                         const GURL& content_url_,
+                         int64 initial_offset);
+
+  // Methods to for handling file operations.
+  int Open(const net::CompletionCallback& callback);
+  void DidOpenContentUrl(
+      const net::CompletionCallback& callback,
+      int result);
+  void DidOpenForRead(
+      net::IOBuffer* buf,
+      int buf_len,
+      const net::CompletionCallback& callback,
+      int open_result);
+  void DidSeekContentUrl(
+      const net::CompletionCallback& callback,
+      int64 seek_result);
+
+  scoped_refptr<base::TaskRunner> task_runner_;
+  const GURL content_url_;
+  const int64 initial_offset_;
+  scoped_ptr<net::FileStream> stream_impl_;
+  base::WeakPtrFactory<ContentUrlStreamReader> weak_factory_;
+};
+
+}  // namespace webkit_blob
+
+#endif  // WEBKIT_BROWSER_BLOB_CONTENT_URL_STREAM_READER_ANDROID_H_