Convert utility process ParseMediaMetadata IPC to mojo

chrome/common/extensions/media_parser_struct_traits.h

+// 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.
+
+#ifndef CHROME_COMMON_EXTENSIONS_MEDIA_PARSER_STRUCT_TRAITS_H_
+#define CHROME_COMMON_EXTENSIONS_MEDIA_PARSER_STRUCT_TRAITS_H_
+
+#include <string>
+
+#include "chrome/common/extensions/media_parser.mojom.h"
+#include "chrome/common/media_galleries/metadata_types.h"
+
+namespace mojo {
+
+using AttachedImageData = extensions::mojom::AttachedImageDataView;

[tibell, 2017/01/09 03:55:52]

Do we allow using in .h files? Doesn't it pollute the mojo namespace?

[Noel Gordon, 2017/01/09 14:54:19]

Done.

+
+template <>
+struct StructTraits<AttachedImageData, metadata::AttachedImage> {
+  static const std::string& type(const metadata::AttachedImage& image) {
+    return image.type;
+  }
+
+  static const std::string& data(const metadata::AttachedImage& image) {
+    return image.data;
+  }
+
+  static bool Read(AttachedImageData view, metadata::AttachedImage* out) {
+    if (!view.ReadType(&out->type))
+      return false;
+    if (!view.ReadData(&out->data))
+      return false;
+    return true;
+  }
+};
+
+}  // namespace mojo
+
+#endif  // CHROME_COMMON_EXTENSIONS_MEDIA_PARSER_STRUCT_TRAITS_H_