Convert utility process ParseMediaMetadata IPC to mojo

chrome/common/extensions/media_parser_struct_traits.h

Index: chrome/common/extensions/media_parser_struct_traits.h
diff --git a/chrome/common/extensions/media_parser_struct_traits.h b/chrome/common/extensions/media_parser_struct_traits.h
new file mode 100644
index 0000000000000000000000000000000000000000..00cf5d44350ab49095d31002c96f394e47b68fad
--- /dev/null
+++ b/chrome/common/extensions/media_parser_struct_traits.h
@@ -0,0 +1,36 @@
+// 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"
+#include "mojo/public/cpp/bindings/array_traits_carray.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<extensions::mojom::AttachedImageDataView,
+                    ::metadata::AttachedImage> {
+  static const std::string& type(const ::metadata::AttachedImage& image) {
+    return image.type;
+  }
+
+  static ConstCArray<uint8_t> data(const ::metadata::AttachedImage& image) {
+    // TODO(dcheng): perhaps metadata::AttachedImage should consider passing the
+    // image data around in a std::vector<uint8_t>.
+    return ConstCArray<uint8_t>(
+        image.data.size(), reinterpret_cast<const uint8_t*>(image.data.data()));
+  }
+
+  static bool Read(extensions::mojom::AttachedImageDataView view,
+                   ::metadata::AttachedImage* out);
+};
+
+}  // namespace mojo
+
+#endif  // CHROME_COMMON_EXTENSIONS_MEDIA_PARSER_STRUCT_TRAITS_H_