WebSocket Mojo API: set reason when disconnecting a WebSocket interface because of insufficient res…

content/browser/websockets/websocket_manager.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/websockets/websocket_manager.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 90 matching lines @@
     delete impl;
   }
 }
 
 void WebSocketManager::DoCreateWebSocket(
     int frame_id,
     blink::mojom::WebSocketRequest request) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   if (num_pending_connections_ >= kMaxPendingWebSocketConnections) {
-    // Too many websockets! By returning here, we let |request| die, which
-    // will be observed by the client as Mojo connection error.
+    // Too many websockets!
+    request.ResetWithReason(
+        blink::mojom::WebSocket::kInsufficientResources,
+        "Error in connection establishment: net::ERR_INSUFFICIENT_RESOURCES");
     return;
   }
 
   // Keep all WebSocketImpls alive until either the client drops its
   // connection (see OnLostConnectionToClient) or we need to shutdown.
 
   impls_.insert(CreateWebSocketImpl(this, std::move(request), frame_id,
                                     CalculateDelay()));
   ++num_pending_connections_;
 
@@ skipping 64 matching lines @@
     --num_pending_connections_;
     DCHECK_GE(num_pending_connections_, 0);
     ++num_current_failed_connections_;
   }
   impl->GoAway();
   impls_.erase(impl);
   delete impl;
 }
 
 }  // namespace content