POSIX: Rewrite IPC's interaction with FileDescriptor
The FileDescriptor API is clearly too hard to use. It's the only IPC
data type which is non-POD and serialising an invalid file descriptor
is fatal to Chrome on POSIX. The use of Maybe is possibly non-obvious
to non-functional programmers.
This patch merges Maybe and FileDescriptor so that serialising invalid
file descriptors is permitted and results in -1 at the other end.
(Serialising /closed/ a file descriptor is still fatal.) Also, it adds
a pointer in base/file_descriptor.h to instructions for its use with
IPC. Although it's generally bad practice to mention IPC in base, in
this case I cannot find another suitable location.
Review URL: http://codereview.chromium.org/39208
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@11041 0039d316-1c4b-4281-b951-d872f2087c98
9 files changed
