bindings: Make the sequence conversion code more complaint with WebIDL.

third_party/WebKit/Source/core/testing/SequenceTest.cpp

+// Copyright 2017 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 "SequenceTest.h"
+
+namespace blink {
+
+SequenceTest::SequenceTest() {}
+
+SequenceTest::~SequenceTest() {}
+
+Vector<Vector<String>> SequenceTest::identityByteStringSequenceSequence(
+    const Vector<Vector<String>>& arg) const {
+  return arg;
+}
+
+Vector<double> SequenceTest::identityDoubleSequence(
+    const Vector<double>& arg) const {
+  return arg;
+}
+
+Vector<String> SequenceTest::identityFoodEnumSequence(
+    const Vector<String>& arg) const {
+  return arg;
+}
+
+Vector<int32_t> SequenceTest::identityLongSequence(
+    const Vector<int32_t>& arg) const {
+  return arg;
+}
+
+Nullable<Vector<uint8_t>> SequenceTest::identityOctetSequenceOrNull(
+    const Nullable<Vector<uint8_t>>& arg) const {
+  return arg;
+}
+
+HeapVector<Member<Element>> SequenceTest::getElementSequence() const {
+  return m_elementSequence;
+}
+
+void SequenceTest::setElementSequence(const HeapVector<Member<Element>>& arg) {
+  m_elementSequence = arg;
+}
+
+bool SequenceTest::unionReceivedSequence(const DoubleOrDoubleSequence& arg) {
+  return arg.isDoubleSequence();
+}
+
+DEFINE_TRACE(SequenceTest) {
+  visitor->Trace(m_elementSequence);
+}
+
+}  // namespace blink