Accomodate files larger than maxint in size in blob/file reading.

webkit/blob/local_file_reader.cc

 // 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.
 
 #include "webkit/blob/local_file_reader.h"
 
 #include "base/file_util.h"
 #include "base/file_util_proxy.h"
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
@@ skipping 24 matching lines @@
 }
 
 // Verify if the underlying file has not been modified.
 bool VerifySnapshotTime(const base::Time& expected_modification_time,
                         const base::PlatformFileInfo& file_info) {
   return expected_modification_time.is_null() ||
          expected_modification_time.ToTimeT() ==
              file_info.last_modified.ToTimeT();
 }
 
-void DidGetFileInfoForGetLength(const net::CompletionCallback& callback,
+void DidGetFileInfoForGetLength(const net::Int64CompletionCallback& callback,
                                 const base::Time& expected_modification_time,
                                 int64 initial_offset,
                                 base::PlatformFileError error,
                                 const base::PlatformFileInfo& file_info) {
   if (file_info.is_directory) {
     callback.Run(net::ERR_FILE_NOT_FOUND);
     return;
   }
   if (error != base::PLATFORM_FILE_OK) {
     callback.Run(PlatformFileErrorToNetError(error));
@@ skipping 106 matching lines @@
 
 int LocalFileReader::Read(net::IOBuffer* buf, int buf_len,
                           const net::CompletionCallback& callback) {
   DCHECK(!has_pending_open_);
   if (stream_impl_.get())
     return stream_impl_->Read(buf, buf_len, callback);
   return Open(base::Bind(&LocalFileReader::DidOpen, weak_factory_.GetWeakPtr(),
                          make_scoped_refptr(buf), buf_len, callback));
 }
 
-int LocalFileReader::GetLength(const net::CompletionCallback& callback) {
+int LocalFileReader::GetLength(const net::Int64CompletionCallback& callback) {
   const bool posted = base::FileUtilProxy::GetFileInfo(
       file_thread_proxy_, file_path_,
       base::Bind(&DidGetFileInfoForGetLength, callback,
                  expected_modification_time_, initial_offset_));
   DCHECK(posted);
   return net::ERR_IO_PENDING;
 }
 
 int LocalFileReader::Open(const OpenFileStreamCallback& callback) {
   DCHECK(!has_pending_open_);
@@ skipping 24 matching lines @@
     return;
   }
   DCHECK(stream_impl.get());
   stream_impl_ = stream_impl.Pass();
   const int read_error = stream_impl_->Read(buf, buf_len, callback);
   if (read_error != net::ERR_IO_PENDING)
     callback.Run(read_error);
 }
 
 }  // namespace webkit_blob