C++ bindings: support using a callback as connection error handler.

mojo/public/cpp/bindings/lib/interface_ptr_internal.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_LIB_INTERFACE_PTR_INTERNAL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_PTR_INTERNAL_H_
 
 #include <algorithm>  // For |std::swap()|.
 
+#include "mojo/public/cpp/bindings/callback.h"
 #include "mojo/public/cpp/bindings/interface_ptr_info.h"
 #include "mojo/public/cpp/bindings/lib/control_message_proxy.h"
 #include "mojo/public/cpp/bindings/lib/filter_chain.h"
 #include "mojo/public/cpp/bindings/lib/message_header_validator.h"
 #include "mojo/public/cpp/bindings/lib/router.h"
 #include "mojo/public/cpp/environment/logging.h"
 
 struct MojoAsyncWaiter;
 
 namespace mojo {
@@ skipping 84 matching lines @@
     return InterfacePtrInfo<Interface>(
         router_ ? router_->PassMessagePipe() : handle_.Pass(), version_);
   }
 
   bool is_bound() const { return handle_.is_valid() || router_; }
 
   bool encountered_error() const {
     return router_ ? router_->encountered_error() : false;
   }
 
-  void set_error_handler(ErrorHandler* error_handler) {
+  void set_connection_error_handler(const Closure& error_handler) {
     ConfigureProxyIfNecessary();
 
     MOJO_DCHECK(router_);
-    router_->set_error_handler(error_handler);
+    router_->set_connection_error_handler(error_handler);
   }
 
   Router* router_for_testing() {
     ConfigureProxyIfNecessary();
     return router_;
   }
 
  private:
   using Proxy = typename Interface::Proxy_;
 
@@ skipping 30 matching lines @@
 
   uint32_t version_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(InterfacePtrState);
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_PTR_INTERNAL_H_