Convert ManifestManager IPCs to Mojo.

mojo/public/cpp/bindings/lib/string_traits_string16.cc

+// Copyright 2016 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/string_traits_string16.h"
+
+#include <string.h>
+
+#include "base/logging.h"
+#include "base/strings/utf_string_conversions.h"
+#include "mojo/public/cpp/bindings/lib/array_internal.h"
+
+namespace mojo {
+namespace {
+
+std::string* ToStdString(const base::string16& input, void* context) {
+  return static_cast<std::string*>(context);
+}
+
+}  // namespace
+
+// static
+void StringTraits<base::string16>::SetToNull(base::string16* output) {
+  output->clear();
+}
+
+// static
+void* StringTraits<base::string16>::SetUpContext(const base::string16& input) {
+  return new std::string(base::UTF16ToUTF8(input));
+}
+
+// static
+void StringTraits<base::string16>::TearDownContext(const base::string16& input,
+                                                   void* context) {
+  delete ToStdString(input, context);
+}
+
+// static
+size_t StringTraits<base::string16>::GetSize(const base::string16& input,
+                                             void* context) {
+  return ToStdString(input, context)->length();
+}
+
+// static
+const char* StringTraits<base::string16>::GetData(const base::string16& input,
+                                                  void* context) {
+  return ToStdString(input, context)->data();
+}
+
+// static
+bool StringTraits<base::string16>::Read(StringDataView input,
+                                        base::string16* output) {
+  return base::UTF8ToUTF16(input.storage(), input.size(), output);
+}
+
+}  // namespace mojo