Canvas API. There are still a number of things to do:

runtime/embedders/openglui/common/isized.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef EMBEDDERS_OPENGLUI_COMMON_ISIZED_H_
 #define EMBEDDERS_OPENGLUI_COMMON_ISIZED_H_
 
+#include <stdint.h>
+
 // An interface for objects that have a size. VMGlue needs the window
 // size when calling setup() (and eventually resize()) but it does not
 // need to know anything else about the window, so we use this interface.
 class ISized {
   public:
     virtual const int32_t& height() = 0;
     virtual const int32_t& width() = 0;
     virtual ~ISized() {}
 };
 
 #endif  // EMBEDDERS_OPENGLUI_COMMON_ISIZED_H_