Wrap MediaMetadata in base::Optional in content and chrome

content/common/media/media_metadata_sanitizer.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/common/media/media_metadata_sanitizer.h"
 
 #include <algorithm>
 #include <string>
 
+#include "content/public/common/media_metadata.h"
+
 namespace content {
 
 namespace {
 
 // Maximum length for all the strings inside the MediaMetadata when it is sent
 // over IPC. The renderer process should truncate the strings before sending
 // the MediaMetadata and the browser process must do the same when receiving
 // it.
 const size_t kMaxIPCStringLength = 4 * 1024;
 
@@ skipping 84 matching lines @@
         CheckArtworkSanity(artwork) ? artwork : SanitizeArtwork(artwork));
 
     if (sanitized_metadata.artwork.size() == kMaxNumberOfArtworkImages)
       break;
   }
 
   return sanitized_metadata;
 }
 
 }  // namespace content