If an idle socket has received data unexpectedly, we can't
reuse it.

Add the IsConnectedAndIdle method, which returns true if the
connection is still alive and idle (hasn't received any data
unexpectedly).

R=eroman
BUG=4606
Review URL: http://codereview.chromium.org/21501

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@10060 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/net/base/ssl_client_socket_unittest.cc b/net/base/ssl_client_socket_unittest.cc
index 47101516..3264c364 100644
--- a/net/base/ssl_client_socket_unittest.cc
+++ b/net/base/ssl_client_socket_unittest.cc
@@ -166,6 +166,11 @@
   EXPECT_TRUE(sock->IsConnected());
 }
 
+// TODO(wtc): Add unit tests for IsConnectedAndIdle:
+//   - Server closes an SSL connection (with a close_notify alert message).
+//   - Server closes the underlying TCP connection directly.
+//   - Server sends data unexpectedly.
+
 TEST_F(SSLClientSocketTest, MAYBE_Read) {
   StartOKServer();