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

mojo/public/cpp/bindings/lib/validation_errors.cc

 // 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.
 
 #include "mojo/public/cpp/bindings/lib/validation_errors.h"
 
 #include "mojo/public/cpp/environment/logging.h"
 
 namespace mojo {
 namespace internal {
 namespace {
 
 ValidationErrorObserverForTesting* g_validation_error_observer = nullptr;
-SerializationWarningObserverForTesting* g_serialization_warning_observer =
-    nullptr;
 
 }  // namespace
 
 const char* ValidationErrorToString(ValidationError error) {
   switch (error) {
     case VALIDATION_ERROR_NONE:
       return "VALIDATION_ERROR_NONE";
     case VALIDATION_ERROR_MISALIGNED_OBJECT:
       return "VALIDATION_ERROR_MISALIGNED_OBJECT";
     case VALIDATION_ERROR_ILLEGAL_MEMORY_RANGE:
@@ skipping 40 matching lines @@
     : last_error_(VALIDATION_ERROR_NONE) {
   MOJO_DCHECK(!g_validation_error_observer);
   g_validation_error_observer = this;
 }
 
 ValidationErrorObserverForTesting::~ValidationErrorObserverForTesting() {
   MOJO_DCHECK(g_validation_error_observer == this);
   g_validation_error_observer = nullptr;
 }
 
-bool ReportSerializationWarning(ValidationError error) {
-  if (g_serialization_warning_observer) {
-    g_serialization_warning_observer->set_last_warning(error);
-    return true;
-  }
-
-  return false;
-}
-
-SerializationWarningObserverForTesting::SerializationWarningObserverForTesting()
-    : last_warning_(VALIDATION_ERROR_NONE) {
-  MOJO_DCHECK(!g_serialization_warning_observer);
-  g_serialization_warning_observer = this;
-}
-
-SerializationWarningObserverForTesting::
-    ~SerializationWarningObserverForTesting() {
-  MOJO_DCHECK(g_serialization_warning_observer == this);
-  g_serialization_warning_observer = nullptr;
-}
-
 }  // namespace internal
 }  // namespace mojo