Fail WebSocket channel when handshake fails.

net/websockets/websocket_handshake_stream_base.h

Index: net/websockets/websocket_handshake_stream_base.h
diff --git a/net/websockets/websocket_handshake_stream_base.h b/net/websockets/websocket_handshake_stream_base.h
index 71d8321824fd1497c2bd4b8a01829c37d54cfd10..2a8f2ca48f6f2f10137c0f8786d13234454bbd9f 100644
--- a/net/websockets/websocket_handshake_stream_base.h
+++ b/net/websockets/websocket_handshake_stream_base.h
@@ -9,6 +9,8 @@
 // Since net/http can be built without linking net/websockets code,
 // this file must not introduce any link-time dependencies on websockets.
 
+#include <string>
+
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ -64,6 +66,10 @@ class NET_EXPORT WebSocketHandshakeStreamBase : public HttpStreamBase {
   // been called.
   virtual scoped_ptr<WebSocketStream> Upgrade() = 0;
 
+  // Returns a string describes the connection failure detailed information.
+  // Returns an empty string if there is no such failure.
+  virtual std::string FailureMessage() const = 0;
+
  protected:
   // As with the destructor, this must be inline.
   WebSocketHandshakeStreamBase() {}