Add a new class SpdyProxyClientSocket which implements ClientSocket...

net/spdy/spdy_stream.h

Index: net/spdy/spdy_stream.h
===================================================================
--- net/spdy/spdy_stream.h	(revision 60671)
+++ net/spdy/spdy_stream.h	(working copy)
@@ -21,6 +21,7 @@
 
 namespace net {
 
+class AddressList;
 class SpdySession;
 class SSLCertRequestInfo;
 class SSLInfo;
@@ -129,6 +130,12 @@
   // Decreases |send_window_size_| by the given number of bytes.
   void DecreaseSendWindowSize(int delta_window_size);
 
+  int GetPeerAddress(AddressList* address) const;
+
+  // Returns true if the underlying transport socket ever had any reads or
+  // writes.
+  bool WasEverUsed() const;
+
   // Increases |recv_window_size_| by the given number of bytes, also sends
   // a WINDOW_UPDATE frame.
   void IncreaseRecvWindowSize(int delta_window_size);