Fix chrome upload with content uri

net/android/content_uri_utils.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 NET_ANDROID_CONTENT_URI_UTILS_H_
+#define NET_ANDROID_CONTENT_URI_UTILS_H_
+
+#include <jni.h>
+
+#include "base/basictypes.h"
+#include "net/base/completion_callback.h"
+#include "net/base/net_export.h"
+#include "url/gurl.h"
+
+namespace base {
+class TaskRunner;
+}
+
+// Utility functions to handle content url on android.
+namespace net {
+
+bool RegisterContentUriUtils(JNIEnv* env);
+
+// Post a task on to the |task_runner| and retrieve the length of a content url
+// file. When finished, |callback| will be executed.
+// Returns net::ERR_IO_PENDING since the task runs asynchronously.
+NET_EXPORT int64 GetContentUrlLength(
+    base::TaskRunner* task_runner,
+    const GURL& content_url,
+    const net::Int64CompletionCallback& callback);
+
+// Get the length of a content url file synchronously. Returns -1 if the url
+// is invalid, or the actual file length otherwise.
+NET_EXPORT int64 GetContentUrlLengthSync(const GURL& content_url);
+
+// Opens a content url for read and returns the file descriptor to the caller.
+// Returns -1 if the url is invalid.
+NET_EXPORT int OpenContentUrlForRead(const GURL& content_url);
+
+}  // namespace net
+
+#endif  // NET_ANDROID_CONTENT_URI_UTILS_H_