[WebSocket] Send a close frame when the renderer process is gone.

content/browser/renderer_host/websocket_host.h

Index: content/browser/renderer_host/websocket_host.h
diff --git a/content/browser/renderer_host/websocket_host.h b/content/browser/renderer_host/websocket_host.h
index 21c77dcbbd558fe56d77ca147f3e60f208875779..39c1e41edbed3d56985f1bba437898bfae234c80 100644
--- a/content/browser/renderer_host/websocket_host.h
+++ b/content/browser/renderer_host/websocket_host.h
@@ -40,10 +40,16 @@ class CONTENT_EXPORT WebSocketHost {
                 net::URLRequestContext* url_request_context);
   virtual ~WebSocketHost();
 
+  // The renderer process is going away.
+  // This function is virtual for testing.
+  virtual void GoAway();
+
   // General message dispatch. WebSocketDispatcherHost::OnMessageReceived
   // delegates to this method after looking up the |routing_id|.
   virtual bool OnMessageReceived(const IPC::Message& message);
 
+  int routing_id() const { return routing_id_; }
+
  private:
   // Handlers for each message type, dispatched by OnMessageReceived(), as
   // defined in content/common/websocket_messages.h