Make net::IOBuffer 64-bit safe

net/base/io_buffer.cc

 // Copyright (c) 2011 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 "net/base/io_buffer.h"
 
 #include "base/logging.h"
 
 namespace net {
 
 IOBuffer::IOBuffer()
     : data_(NULL) {
 }
 
 IOBuffer::IOBuffer(int buffer_size) {
-  DCHECK(buffer_size > 0);
+  CHECK_GT(buffer_size, 0);
   data_ = new char[buffer_size];
 }
 
 IOBuffer::IOBuffer(char* data)
     : data_(data) {
 }
 
 IOBuffer::~IOBuffer() {
   delete[] data_;
   data_ = NULL;
 }
 
 IOBufferWithSize::IOBufferWithSize(int size)
     : IOBuffer(size),
       size_(size) {
 }
 
 IOBufferWithSize::IOBufferWithSize(char* data, int size)
     : IOBuffer(data),
       size_(size) {
 }
 
 IOBufferWithSize::~IOBufferWithSize() {
 }
 
 StringIOBuffer::StringIOBuffer(const std::string& s)
     : IOBuffer(static_cast<char*>(NULL)),
       string_data_(s) {
+  CHECK_LT(s.size(), static_cast<size_t>(INT_MAX));
   data_ = const_cast<char*>(string_data_.data());
 }
 
 StringIOBuffer::~StringIOBuffer() {
   // We haven't allocated the buffer, so remove it before the base class
   // destructor tries to delete[] it.
   data_ = NULL;
 }
 
 DrainableIOBuffer::DrainableIOBuffer(IOBuffer* base, int size)
@@ skipping 74 matching lines @@
 
 WrappedIOBuffer::WrappedIOBuffer(const char* data)
     : IOBuffer(const_cast<char*>(data)) {
 }
 
 WrappedIOBuffer::~WrappedIOBuffer() {
   data_ = NULL;
 }
 
 }  // namespace net