Turn off scalarize_vec_and_mat_constructor_args workaround everywhere

There is a bug in the workaround, so we should fix it before turning it on.

This is simply removing a few entries in the json file,
plus surpressing affected WebGL conformance tests.

Very safe CL.

BUG=398694
TEST=gpu_unitests, gpu linux bots green
TBR=kbr@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/421413003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@286406 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed