mojo::Serialize*_() calls now propogate/return validation errors.

mojo/public/cpp/bindings/lib/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/control_message_proxy.h"
 
 #include "mojo/public/cpp/bindings/lib/message_builder.h"
 #include "mojo/public/cpp/bindings/message.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/interfaces/bindings/interface_control_messages.mojom.h"
@@ skipping 34 matching lines @@
                     const RunCallback& callback) {
   RunMessageParamsPtr params_ptr(RunMessageParams::New());
   params_ptr->reserved0 = 16u;
   params_ptr->reserved1 = 0u;
   params_ptr->query_version = query_version.Pass();
 
   size_t size = GetSerializedSize_(*params_ptr);
   RequestMessageBuilder builder(kRunMessageId, size);
 
   RunMessageParams_Data* params = nullptr;
-  Serialize_(params_ptr.get(), builder.buffer(), &params);
+  auto result = Serialize_(params_ptr.get(), builder.buffer(), &params);
+  MOJO_DCHECK(result == VALIDATION_ERROR_NONE);
+
   params->EncodePointersAndHandles(builder.message()->mutable_handles());
   MessageReceiver* responder = new RunResponseForwardToCallback(callback);
   if (!receiver->AcceptWithResponder(builder.message(), responder))
     delete responder;
 }
 
 void SendRunOrClosePipeMessage(MessageReceiverWithResponder* receiver,
                                RequireVersionPtr require_version) {
   RunOrClosePipeMessageParamsPtr params_ptr(RunOrClosePipeMessageParams::New());
   params_ptr->reserved0 = 16u;
   params_ptr->reserved1 = 0u;
   params_ptr->require_version = require_version.Pass();
 
   size_t size = GetSerializedSize_(*params_ptr);
   MessageBuilder builder(kRunOrClosePipeMessageId, size);
 
   RunOrClosePipeMessageParams_Data* params = nullptr;
-  Serialize_(params_ptr.get(), builder.buffer(), &params);
+  auto result = Serialize_(params_ptr.get(), builder.buffer(), &params);
+  MOJO_DCHECK(result == VALIDATION_ERROR_NONE);
+
   params->EncodePointersAndHandles(builder.message()->mutable_handles());
   bool ok = receiver->Accept(builder.message());
   MOJO_ALLOW_UNUSED_LOCAL(ok);
 }
 
 }  // namespace
 
 ControlMessageProxy::ControlMessageProxy(MessageReceiverWithResponder* receiver)
     : receiver_(receiver) {
 }
 
 void ControlMessageProxy::QueryVersion(
     const Callback<void(uint32_t)>& callback) {
   auto run_callback = [callback](QueryVersionResultPtr query_version_result) {
     callback.Run(query_version_result->version);
   };
   SendRunMessage(receiver_, QueryVersion::New(), run_callback);
 }
 
 void ControlMessageProxy::RequireVersion(uint32_t version) {
   RequireVersionPtr require_version(RequireVersion::New());
   require_version->version = version;
   SendRunOrClosePipeMessage(receiver_, require_version.Pass());
 }
 
 }  // namespace internal
 }  // namespace mojo