Add HTTPBodyStream interface, three concrete implementations, and their tests.

util/file/fd_io.h

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 61 matching lines @@
 //! \brief Wraps ReadFD(), ensuring that it indicates end-of-file.
 //!
 //! Attempts to read a single byte from \a fd, expecting no data to be read. If
 //! the underlying ReadFD() fails, or if a byte actually is read, this function
 //! causes execution to terminate without returning.
 //!
 //! \sa CheckedReadFD
 //! \sa ReadFD
 void CheckedReadFDAtEOF(int fd);
 
+//! \brief Wraps `close()`, logging an error if the operation fails.
+//!
+//! \return On success, `true` is returned. On failure, an error is logged and
+//!     `false` is returned.
+bool LoggingCloseFD(int fd);
+
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_FILE_FD_IO_H_