Avoid touching members in InterfaceImpl::ErrorHandlerImpl after calling OnConnectionError

mojo/public/cpp/bindings/binding.h

 // Copyright 2014 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.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_BINDING_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_BINDING_H_
 
 #include "mojo/public/c/environment/async_waiter.h"
 #include "mojo/public/cpp/bindings/error_handler.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
@@ skipping 45 matching lines @@
     Bind(ptr, waiter);
   }
 
   Binding(Interface* impl,
           InterfaceRequest<Interface> request,
           const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter())
       : Binding(impl) {
     Bind(request.PassMessagePipe(), waiter);
   }
 
-  virtual ~Binding() {
+  ~Binding() override {
     delete proxy_;
     if (internal_router_) {
       internal_router_->set_error_handler(nullptr);
       delete internal_router_;
     }
   }
 
   void Bind(
       ScopedMessagePipeHandle handle,
       const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter()) {
@@ skipping 50 matching lines @@
   typename Interface::Stub_ stub_;
   Interface* impl_;
   ErrorHandler* error_handler_ = nullptr;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(Binding);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_BINDING_H_