Implement MediaMetadata artwork in content

content/public/common/media_metadata.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 "content/public/common/media_metadata.h"
 
+#include <algorithm>
+
 namespace content {
 
 const size_t MediaMetadata::kMaxIPCStringLength = 4 * 1024;
+const int MediaMetadata::kMaxIconSize = 4 * 1024;
+const size_t MediaMetadata::kMaxArtworkTypeLength = 2 * 127 + 1;
 
 MediaMetadata::MediaMetadata() = default;
 
 MediaMetadata::~MediaMetadata() = default;
 
 bool MediaMetadata::operator==(const MediaMetadata& other) const {
-  return title == other.title && artist == other.artist && album == other.album;
+  return title == other.title && artist == other.artist &&
+      album == other.album && artwork == other.artwork;
 }
 
 bool MediaMetadata::operator!=(const MediaMetadata& other) const {
   return !this->operator==(other);
 }
 
+base::Optional<MediaMetadata::Artwork> MediaMetadata::SanitizeArtwork(
+    const MediaMetadata::Artwork& artwork) {
+  if (!artwork.src.is_valid() || !artwork.src.IsStandard() ||
+      (!artwork.src.SchemeIsHTTPOrHTTPS() &&
+       !artwork.src.SchemeIsFile())) {
+    return base::nullopt;
+  }
+  Artwork sanitized_artwork;
+  sanitized_artwork.src = artwork.src;
+  sanitized_artwork.type = artwork.type.is_null() ?
+      base::NullableString16() :
+      base::NullableString16(
+          artwork.type.string().substr(0, kMaxArtworkTypeLength),
+          false);
+  std::copy_if(artwork.sizes.begin(), artwork.sizes.end(),
+               sanitized_artwork.sizes.begin(),
+               [](const gfx::Size& size) {
+                 return size.width() >= 0 && size.width() <= kMaxIconSize &&
+                     size.height() >= 0 && size.height() <= kMaxIconSize; });
+  return sanitized_artwork;
+}
+
 }  // namespace content