Extend media glue code to support the VideoToolbox cast video encoder.

media/base/mac/corevideo_glue.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 MEDIA_BASE_MAC_COREVIDEO_GLUE_H_
+#define MEDIA_BASE_MAC_COREVIDEO_GLUE_H_
+
+#include "base/basictypes.h"
+#include "media/base/media_export.h"
+
+// Although CoreVideo exists in 10.6, not all of its types and functions were
+// introduced in that release. Clients can use this class to access types,
+// constants and functions not available in 10.6.
+class MEDIA_EXPORT CoreVideoGlue {
+ public:
+  // Originally from CVPixelBuffer.h
+  typedef struct CVPlanarPixelBufferInfo_YCbCrPlanar
+      CVPlanarPixelBufferInfo_YCbCrPlanar;
+  struct CVPlanarPixelBufferInfo_YCbCrBiPlanar {
+    CVPlanarComponentInfo componentInfoY;
+    CVPlanarComponentInfo componentInfoCbCr;
+  };
+  typedef struct CVPlanarPixelBufferInfo_YCbCrBiPlanar
+      CVPlanarPixelBufferInfo_YCbCrBiPlanar;
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(CoreVideoGlue);
+};
+
+#endif  // MEDIA_BASE_MAC_COREVIDEO_GLUE_H_