Add libva to chromium third_party.

third_party/libva/test/v4l_h264/README.txt

Index: third_party/libva/test/v4l_h264/README.txt
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+V4L-H264
+========
+The goal of the sample code is to demonstrate the H264 encoding and decoding capabilities of Intel GPU, Sandy Bridge and successor, using libva API under X11.
+
+Encoder part is based on http://cgit.freedesktop.org/libva/tree/test/encode/avcenc.c
+V4L-Capture part is based on http://linuxtv.org/downloads/v4l-dvb-apis/capture-example.html 
+
+
+Running it locally: It's mandatory to start the `decode' first.
+./decode -> will wait for a connection
+./encode -> will try to open /dev/video0, configure it and stream it out
+
+Specifying the port, ip and video input parameters
+
+Window A (first):
+./decode -p 9999
+
+Window B (second):
+./encode -p 9999 -I 192.168.1.144 -d /dev/video0 -W 1280 -H 960
+
+For more info:
+./encode -? 
+./decode -?