Move AuthenticatingURLLoader app from ErrorHandler to callbacks

services/authenticating_url_loader_interceptor/authenticating_url_loader_interceptor.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 SERVICES_AUTHENTICATING_URL_LOADER_INTERCEPTOR_AUTHENTICATING_URL_LOADER_INTERCEPTOR_H_
 #define SERVICES_AUTHENTICATING_URL_LOADER_INTERCEPTOR_AUTHENTICATING_URL_LOADER_INTERCEPTOR_H_
 
 #include "mojo/public/cpp/bindings/binding.h"
-#include "mojo/public/cpp/bindings/error_handler.h"
 #include "mojo/services/network/public/interfaces/url_loader.mojom.h"
 #include "services/authenticating_url_loader_interceptor/authenticating_url_loader_interceptor_factory.h"
 #include "url/gurl.h"
 
 namespace mojo {
 
 class NetworkService;
 
 enum RequestAuthorizationState {
   REQUEST_INITIAL,
   REQUEST_USED_CURRENT_AUTH_SERVICE_TOKEN,
   REQUEST_USED_FRESH_AUTH_SERVICE_TOKEN,
 };
 
-class AuthenticatingURLLoaderInterceptor : public URLLoaderInterceptor,
-                                           public ErrorHandler {
+class AuthenticatingURLLoaderInterceptor : public URLLoaderInterceptor {
  public:
   AuthenticatingURLLoaderInterceptor(
       mojo::InterfaceRequest<URLLoaderInterceptor> request,
       AuthenticatingURLLoaderInterceptorFactory* factory);
   ~AuthenticatingURLLoaderInterceptor() override;
 
+  void set_connection_error_handler(const Closure& error_handler);
+
  private:
   // URLLoaderInterceptor:
   void InterceptRequest(mojo::URLRequestPtr request,
                         const InterceptRequestCallback& callback) override;
   void InterceptFollowRedirect(
       const InterceptResponseCallback& callback) override;
   void InterceptResponse(mojo::URLResponsePtr response,
                          const InterceptResponseCallback& callback) override;
 
-  // ErrorHandler:
-  void OnConnectionError() override;
-
   void OnOAuth2TokenReceived(std::string token);
 
   URLRequestPtr BuildRequest(std::string token);
   void StartRequest(mojo::URLRequestPtr request);
 
   Binding<URLLoaderInterceptor> binding_;
+
+  // Owns this object.
   AuthenticatingURLLoaderInterceptorFactory* factory_;
   InterceptResponseCallback pending_interception_callback_;
   URLResponsePtr pending_response_;
   bool add_authentication_;
   RequestAuthorizationState request_authorization_state_;
   GURL url_;
   bool auto_follow_redirects_;
   bool bypass_cache_;
   Array<HttpHeaderPtr> headers_;
 };
 
 }  // namespace mojo
 
 #endif  // SERVICES_AUTHENTICATING_URL_LOADER_INTERCEPTOR_AUTHENTICATING_URL_LOADER_INTERCEPTOR_H_