Add VAVDA, the VAAPI Video Decode Accelerator for Intel CPUs.

content/content_common.gypi

Index: content/content_common.gypi
diff --git a/content/content_common.gypi b/content/content_common.gypi
index e7114b646eebbd2e7f5c1b31350fb4c8dede4415..8eccb90b07cd6eae43d7025e41ba0518335c74c7 100644
--- a/content/content_common.gypi
+++ b/content/content_common.gypi
@@ -396,6 +396,19 @@
         'common/gpu/media/h264_parser.h',
       ],
     }],
+    ['chromeos == 1', {
+      'sources': [
+        'common/gpu/media/h264_dpb.cc',
+        'common/gpu/media/h264_dpb.h',
+        'common/gpu/media/vaapi_h264_decoder.cc',
+        'common/gpu/media/vaapi_h264_decoder.h',
+        'common/gpu/media/vaapi_video_decode_accelerator.cc',
+        'common/gpu/media/vaapi_video_decode_accelerator.h',
+      ],
+      'include_dirs': [
+        '<(DEPTH)/third_party/libva',
+      ],
+    }],
     ['OS=="win"', {
       'dependencies': [
         '../media/media.gyp:media',