[CSS Shaders] Validate types of built-in uniforms

[Max Vujovic]

When an author defines a built-in uniform, WebKit should check its type.

For example, the following should be an error because u_textureSize should be a vec2, not a float:
attribute float u_textureSize;

Built-in uniforms list: https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#shader-uniform-variables

[Max Vujovic]

Created attachment 171467 [details]
Patch

[WebKit Review Bot]

Comment on attachment 171467 [details]
Patch

Rejecting attachment 171467 [details] from commit-queue.

Failed to run "['/mnt/git/webkit-commit-queue/Tools/Scripts/webkit-patch', '--status-host=queues.webkit.org', '-..." exit_code: 2

Last 500 characters of output:
 1

Died at Tools/Scripts/update-webkit line 154.

Failed to run "['Tools/Scripts/update-webkit', '--chromium', '--force-update']" exit_code: 9
/video-* tests on Linux and Mac.

When you have resolved this problem run "git rebase --continue".
If you would prefer to skip this patch, instead run "git rebase --skip".
To restore the original branch and stop rebasing run "git rebase --abort".

rebase refs/remotes/origin/master: command returned error: 1

Died at Tools/Scripts/update-webkit line 154.

Full output: http://queues.webkit.org/results/14561173

[Max Vujovic]

Created attachment 171694 [details]
Patch

Rebased patch.

Thanks for the review, Dean!

[WebKit Review Bot]

Comment on attachment 171694 [details]
Patch

Clearing flags on attachment: 171694

Committed r133083: <http://trac.webkit.org/changeset/133083>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.