Add libva to chromium third_party.

third_party/libva/va/va_x11.h

Index: third_party/libva/va/va_x11.h
diff --git a/third_party/libva/va/va_x11.h b/third_party/libva/va/va_x11.h
new file mode 100644
index 0000000000000000000000000000000000000000..c6f967000ad8818cee8c11c153ecebd5d013f359
--- /dev/null
+++ b/third_party/libva/va/va_x11.h
@@ -0,0 +1,47 @@
+#ifndef _VA_X11_H_
+#define _VA_X11_H_
+
+#include <va/va.h>
+#include <X11/Xlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Returns a suitable VADisplay for VA API
+ */
+VADisplay vaGetDisplay (
+    Display *dpy
+);
+
+/*
+ * Output rendering
+ * Following is the rendering interface for X windows, 
+ * to get the decode output surface to a X drawable
+ * It basically performs a de-interlacing (if needed), 
+ * color space conversion and scaling to the destination
+ * rectangle
+ */
+VAStatus vaPutSurface (
+    VADisplay dpy,
+    VASurfaceID surface,	
+    Drawable draw, /* X Drawable */
+    short srcx,
+    short srcy,
+    unsigned short srcw,
+    unsigned short srch,
+    short destx,
+    short desty,
+    unsigned short destw,
+    unsigned short desth,
+    VARectangle *cliprects, /* client supplied destination clip list */
+    unsigned int number_cliprects, /* number of clip rects in the clip list */
+    unsigned int flags /* PutSurface flags */
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _VA_X11_H_ */