Use the exact-width integer types defined in <stdint.h> rather than

net/base/file_stream.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.
 
 // This file defines FileStream, a basic interface for reading and writing files
 // synchronously or asynchronously with support for seeking to an offset.
 // Note that even when used asynchronously, only one operation is supported at
 // a time.
 
 #ifndef NET_BASE_FILE_STREAM_H_
@@ skipping 50 matching lines @@
 
   // Returns true if Open succeeded and Close has not been called.
   virtual bool IsOpen() const;
 
   // Adjust the position from where data is read asynchronously.
   // Upon success, ERR_IO_PENDING is returned and |callback| will be run
   // on the thread where Seek() was called with the the stream position
   // relative to the start of the file.  Otherwise, an error code is returned.
   // It is invalid to request any asynchronous operations while there is an
   // in-flight asynchronous operation.
-  virtual int Seek(base::File::Whence whence, int64 offset,
+  virtual int Seek(base::File::Whence whence,
+                   int64_t offset,
                    const Int64CompletionCallback& callback);
 
   // Call this method to read data from the current stream 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.
   //
   // The file must be opened with FLAG_ASYNC, and a non-null
   // callback must be passed to this method. If the read could not
@@ skipping 70 matching lines @@
   // without explicitly calling Close, the file should be closed asynchronously
   // without delaying FileStream's destructor.
   scoped_ptr<Context> context_;
 
   DISALLOW_COPY_AND_ASSIGN(FileStream);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_FILE_STREAM_H_