Implement MediaMetadata artwork in content

content/common/media/media_metadata_sanitizer.h

Index: content/common/media/media_metadata_sanitizer.h
diff --git a/content/common/media/media_metadata_sanitizer.h b/content/common/media/media_metadata_sanitizer.h
new file mode 100644
index 0000000000000000000000000000000000000000..fa08ebb745e0622c35cfcfe4341350a3d152e26d
--- /dev/null
+++ b/content/common/media/media_metadata_sanitizer.h
@@ -0,0 +1,23 @@
+// 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.
+
+#ifndef CONTENT_COMMON_MEDIA_MEDIA_METADATA_SANITIZER_H_
+#define CONTENT_COMMON_MEDIA_MEDIA_METADATA_SANITIZER_H_
+
+#include "content/public/common/media_metadata.h"
+
+namespace content {
+
+class MediaMetadataSanitizer {
+ public:
+  // Check the sanity of |metadata|.
+  static bool CheckSanity(const MediaMetadata& metadata);
+
+  // Sanitizes |metadata| and return the result.
+  static MediaMetadata Sanitize(const MediaMetadata& metadata);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_MEDIA_MEDIA_METADATA_SANITIZER_H_