Mojo C++ bindings: clean up pending callbacks when connection error occurs.

mojo/public/cpp/bindings/lib/interface_endpoint_client.cc

 // Copyright 2015 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 "mojo/public/cpp/bindings/interface_endpoint_client.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 248 matching lines @@
 
   return payload_validator_->Accept(message);
 }
 
 void InterfaceEndpointClient::NotifyError() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (encountered_error_)
     return;
   encountered_error_ = true;
+
+  // The callbacks may hold on to resources. There is no need to keep them any
+  // longer.
+  async_responders_.clear();
+
   if (!error_handler_.is_null())
     error_handler_.Run();
 }
 
 bool InterfaceEndpointClient::HandleValidatedMessage(Message* message) {
   DCHECK_EQ(handle_.id(), message->interface_id());
+  DCHECK(!encountered_error_);
 
   if (message->has_flag(Message::kFlagExpectsResponse)) {
     if (!incoming_receiver_)
       return false;
 
     MessageReceiverWithStatus* responder =
         new ResponderThunk(weak_ptr_factory_.GetWeakPtr(), task_runner_);
     bool ok = incoming_receiver_->AcceptWithResponder(message, responder);
     if (!ok)
       delete responder;
@@ skipping 18 matching lines @@
     return responder->Accept(message);
   } else {
     if (!incoming_receiver_)
       return false;
 
     return incoming_receiver_->Accept(message);
   }
 }
 
 }  // namespace mojo