Assorted fixes for 64-bit.

net/base/file_stream_posix.cc

 // Copyright (c) 2008 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.
 
 // For 64-bit file access (off_t = off64_t, lseek64, etc).
 #define _FILE_OFFSET_BITS 64
 
 #include "net/base/file_stream.h"
 
 #include <sys/types.h>
@@ skipping 364 matching lines @@
 
   return size - cur_pos;
 }
 
 int FileStream::Read(
     char* buf, int buf_len, CompletionCallback* callback) {
   if (!IsOpen())
     return ERR_UNEXPECTED;
 
   // read(..., 0) will return 0, which indicates end-of-file.
-  DCHECK(buf_len > 0 && buf_len <= SSIZE_MAX);
+  DCHECK(buf_len > 0);
   DCHECK(open_flags_ & base::PLATFORM_FILE_READ);
 
   if (async_context_.get()) {
     DCHECK(open_flags_ & base::PLATFORM_FILE_ASYNC);
     // If we're in async, make sure we don't have a request in flight.
     DCHECK(!async_context_->callback());
     async_context_->InitiateAsyncRead(file_, buf, buf_len, callback);
     return ERR_IO_PENDING;
   } else {
     return ReadFile(file_, buf, buf_len);
@@ skipping 17 matching lines @@
     buf += bytes_read;
     to_read -= bytes_read;
   } while (bytes_total < buf_len);
 
   return bytes_total;
 }
 
 int FileStream::Write(
     const char* buf, int buf_len, CompletionCallback* callback) {
   // write(..., 0) will return 0, which indicates end-of-file.
-  DCHECK(buf_len > 0 && buf_len <= SSIZE_MAX);
+  DCHECK(buf_len > 0);
 
   if (!IsOpen())
     return ERR_UNEXPECTED;
 
   if (async_context_.get()) {
     DCHECK(open_flags_ & base::PLATFORM_FILE_ASYNC);
     // If we're in async, make sure we don't have a request in flight.
     DCHECK(!async_context_->callback());
     async_context_->InitiateAsyncWrite(file_, buf, buf_len, callback);
     return ERR_IO_PENDING;
@@ skipping 13 matching lines @@
   int64 seek_position = Seek(FROM_BEGIN, bytes);
   if (seek_position != bytes)
     return ERR_UNEXPECTED;
 
   // And truncate the file.
   int result = ftruncate(file_, bytes);
   return result == 0 ? seek_position : MapErrorCode(errno);
 }
 
 }  // namespace net