Fix chrome upload with content uri

webkit/browser/blob/file_stream_reader.h

 // Copyright (c) 2012 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_BLOB_FILE_STREAM_READER_H_
 #define WEBKIT_BLOB_FILE_STREAM_READER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "net/base/completion_callback.h"
 #include "webkit/browser/webkit_storage_browser_export.h"
 
 namespace base {
 class FilePath;
 class TaskRunner;
 class Time;
 }
 
 namespace net {
 class IOBuffer;
 }
 
 namespace fileapi {
 class FileSystemContext;
 class FileSystemURL;
 }
 
+#if defined(OS_ANDROID)
+class GURL;
+#endif
+
 namespace webkit_blob {
 
 // A generic interface for reading a file-like object.
 class FileStreamReader {
  public:
   // Creates a new FileReader for a local file |file_path|.
   // |initial_offset| specifies the offset in the file where the first read
   // should start.  If the given offset is out of the file range any
   // read operation may error out with net::ERR_REQUEST_RANGE_NOT_SATISFIABLE.
   // |expected_modification_time| specifies the expected last modification
@@ skipping 11 matching lines @@
   // |expected_modification_time| specifies the expected last modification if
   // the value is non-null, the reader will check the underlying file's actual
   // modification time to see if the file has been modified, and if it does any
   // succeeding read operations should fail with ERR_UPLOAD_FILE_CHANGED error.
   WEBKIT_STORAGE_BROWSER_EXPORT static FileStreamReader*
       CreateForFileSystemFile(fileapi::FileSystemContext* context,
                               const fileapi::FileSystemURL& url,
                               int64 initial_offset,
                               const base::Time& expected_modification_time);
 
+#if defined(OS_ANDROID)
+  // Creates a new reader for a content URL |url| form |initial_offset|.
+  WEBKIT_STORAGE_BROWSER_EXPORT static FileStreamReader*
+      CreateForContentUrl(base::TaskRunner* task_runner,
+                          const GURL& content_url,
+                          int64 initial_offset);
+#endif
+
   // It is valid to delete the reader at any time.  If the stream is deleted
   // while it has a pending read, its callback will not be called.
   virtual ~FileStreamReader() {}
 
   // Reads from the current cursor position asynchronously.
   //
   // Up to buf_len bytes will be copied into buf.  (In other words, partial
   // reads are allowed.)  Returns the number of bytes copied, 0 if at
   // end-of-file, or an error code if the operation could not be performed.
   // If the read could not complete synchronously, then ERR_IO_PENDING is
@@ skipping 15 matching lines @@
   // |callback| will not be called.
   // Note that the return type is int64 to return a larger file's size (a file
   // larger than 2G) but an error code should fit in the int range (may be
   // smaller than int64 range).
   virtual int64 GetLength(const net::Int64CompletionCallback& callback) = 0;
 };
 
 }  // namespace webkit_blob
 
 #endif  // WEBKIT_BLOB_FILE_STREAM_READER_H_