gfx: Fix sending native ozone pixmaps from InProcessCommandBuffer.

ui/gfx/native_pixmap_handle.h

Index: ui/gfx/native_pixmap_handle.h
diff --git a/ui/gfx/native_pixmap_handle.h b/ui/gfx/native_pixmap_handle.h
index eca2bd1dd9cddd9a2653fa1516eb60c52e81465c..986c5a29d82fbd7a0bf24f522f344a385a69159a 100644
--- a/ui/gfx/native_pixmap_handle.h
+++ b/ui/gfx/native_pixmap_handle.h
@@ -6,6 +6,8 @@
 #define UI_GFX_NATIVE_PIXMAP_HANDLE_H_
 
 #include <stddef.h>
+#include <stdint.h>
+
 #include <vector>
 
 #include "ui/gfx/gfx_export.h"
@@ -50,6 +52,13 @@ struct GFX_EXPORT NativePixmapHandle {
   std::vector<NativePixmapPlane> planes;
 };
 
+#if defined(USE_OZONE)
+// Returns an instance of |handle| which can be sent over IPC. This duplicates
+// the file-handles, so that the IPC code take ownership of them, without
+// invalidating |handle|.
+NativePixmapHandle CloneHandleForIPC(const NativePixmapHandle& handle);
+#endif
+
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_PIXMAP_HANDLE_H_