An implementation of chrome.socket.secure().

chrome/browser/extensions/api/socket/tcp_socket.cc

Index: chrome/browser/extensions/api/socket/tcp_socket.cc
diff --git a/chrome/browser/extensions/api/socket/tcp_socket.cc b/chrome/browser/extensions/api/socket/tcp_socket.cc
index 4f9273468ab31690db5401025e197e63b9aa6cb3..c4d1a3d4387367cc35f33b3dcd2bbc53f23a1cad 100644
--- a/chrome/browser/extensions/api/socket/tcp_socket.cc
+++ b/chrome/browser/extensions/api/socket/tcp_socket.cc
@@ -306,6 +306,35 @@ void TCPSocket::OnAccept(int result) {
   accept_callback_.Reset();
 }
 
+void TCPSocket::Release() {
+  // Release() is only invoked when the underlying sockets are taken (via
+  // ClientStream()) by TLSSocket. TLSSocket only supports CLIENT-mode
+  // sockets.
+  DCHECK(!server_socket_.release() && !accept_socket_.release() &&
+         socket_mode_ == CLIENT)
+      << "TCPSocket::Release called in server mode.";
+
+  // Release() doesn't disconnect the underlying sockets, but it does
+  // disconnect them from this TCPSocket.
+  is_connected_ = false;
+
+  connect_callback_.Reset();
+  read_callback_.Reset();
+  accept_callback_.Reset();
+
+  net::TCPClientSocket* client_socket;
+  client_socket = socket_.release();

[Ryan Sleevi, 2014/03/18 01:05:13]

may get a clang warning here (because client_socket is assigned but not used)

You could rewrite this

DCHECK(socket_.get()) << "TCPSocket::Release on a null client socket.";
socket_.release();

[lally, 2014/03/26 03:17:51]

release() has WARN_UNUSED_RESULT on it, so the bare release() would get a
warning instead.  It builds in the current way for both debug and release modes
without compiler complaint.

[Ryan Sleevi, 2014/03/26 19:57:40]

https://code.google.com/p/chromium/codesearch#chromium/src/base/macros.h&l=277

Is specifically designed for this use case. Sorry I wasn't clearer.

[lally, 2014/03/28 16:22:50]

Done.

+  DCHECK(client_socket) << "TCPSocket::Release on null client socket.";
+}
+
+net::TCPClientSocket* TCPSocket::ClientStream() {
+  if (socket_mode_ != CLIENT || GetSocketType() != TYPE_TCP)
+    return NULL;
+  return socket_.get();
+}
+
+bool TCPSocket::HasPendingRead() const { return !read_callback_.is_null(); }
+
 ResumableTCPSocket::ResumableTCPSocket(const std::string& owner_extension_id)
     : TCPSocket(owner_extension_id),
       persistent_(false),