Hook up two GPU driver bug workarounds.

* scalarize_vec_and_mat_constructor_args
   per discussion with kbr, we decided to turn it on always for
   consistency.
* regenerate_struct_names
   all mac drivers, linux amd drivers

BUG=398694,403957
TEST=gpu_unittests
R=bajones@chromium.org,kbr@chromium.org

Review URL: https://codereview.chromium.org/474093002

git-svn-id: http://src.chromium.org/svn/trunk/src/gpu@290303 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
Disable HW video decoder acceleration on Samsung Galaxy Note and Galaxy S3/S4 devices.
Some of these devices use buggy omx.sec.vp8.dec as a default VP8 decoder.

BUG=396578

Review URL: https://codereview.chromium.org/480133003

git-svn-id: http://src.chromium.org/svn/trunk/src/gpu@290454 4ff67af0-8c30-449e-8e8b-ad334ec8d88c