Implement MediaMetadata artwork in content

content/public/common/manifest.h

 // Copyright 2014 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_PUBLIC_COMMON_MANIFEST_H_
 #define CONTENT_PUBLIC_COMMON_MANIFEST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 12 matching lines @@
 // described in the "Manifest for Web Application" document:
 // http://w3c.github.io/manifest/
 struct CONTENT_EXPORT Manifest {
   // Structure representing an icon as per the Manifest specification, see:
   // http://w3c.github.io/manifest/#dfn-icon-object
   struct CONTENT_EXPORT Icon {
     Icon();
     Icon(const Icon& other);
     ~Icon();
 
+    bool operator==(const Icon& other) const;
+
     // MUST be a valid url. If an icon doesn't have a valid URL, it will not be
     // successfully parsed, thus will not be represented in the Manifest.
     GURL src;
 
     // Null if the parsing failed or the field was not present. The type can be
     // any string and doesn't have to be a valid image MIME type at this point.
     // It is up to the consumer of the object to check if the type matches a
     // supported type.
     base::NullableString16 type;
 
@@ skipping 86 matching lines @@
   static const size_t kMaxIPCStringLength;
 
   // Constant representing an invalid color. Set to a value outside the
   // range of a 32-bit integer.
   static const int64_t kInvalidOrMissingColor;
 };
 
 } // namespace content
 
 #endif // CONTENT_PUBLIC_COMMON_MANIFEST_H_