Mojo: Report bindings validation errors via MojoNotifyBadMessage

mojo/public/cpp/bindings/lib/pipe_control_message_proxy.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/lib/pipe_control_message_proxy.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/compiler_specific.h"
@@ skipping 17 matching lines @@
   size_t size =
       PrepareToSerialize<pipe_control::RunOrClosePipeMessageParamsPtr>(
           params_ptr, context);
   MessageBuilder builder(pipe_control::kRunOrClosePipeMessageId, size);
 
   pipe_control::internal::RunOrClosePipeMessageParams_Data* params = nullptr;
   Serialize<pipe_control::RunOrClosePipeMessageParamsPtr>(
       params_ptr, builder.buffer(), &params, context);
   params->EncodePointers();
   builder.message()->set_interface_id(kInvalidInterfaceId);
-  bool ok = receiver->Accept(builder.message());
+  Error send_error;
+  bool ok = receiver->Accept(builder.message(), &send_error);
   // This return value may be ignored as !ok implies the underlying message pipe
   // has encountered an error, which will be visible through other means.
   ALLOW_UNUSED_LOCAL(ok);
 }
 
 }  // namespace
 
 PipeControlMessageProxy::PipeControlMessageProxy(MessageReceiver* receiver)
     : receiver_(receiver) {}
 
@@ skipping 18 matching lines @@
 
   pipe_control::RunOrClosePipeInputPtr input(
       pipe_control::RunOrClosePipeInput::New());
   input->set_associated_endpoint_closed_before_sent_event(std::move(event));
 
   SendRunOrClosePipeMessage(receiver_, std::move(input), &context_);
 }
 
 }  // namespace internal
 }  // namespace mojo