Add support for khronos gl-cts using its drawElements apis

gpu/khronos_conform_support/DEPS

Index: gpu/khronos_conform_support/DEPS
diff --git a/gpu/khronos_conform_support/DEPS b/gpu/khronos_conform_support/DEPS
new file mode 100644
index 0000000000000000000000000000000000000000..101989cda49eb67fca1d2fd3fd6cddec9a387bad
--- /dev/null
+++ b/gpu/khronos_conform_support/DEPS
@@ -0,0 +1,3 @@
+include_rules = [
+  "+third_party/khronos_conform",

[piman, 2014/09/10 20:12:50]

I don't see this directory in either my local checkout nor any of the DEPS files
(either internal or external)

[U. Artie Eoff, 2014/09/10 22:12:59]

I guess I'm not certain what this file really does.  But essentially you'll have
to clone your licensed version of the khronos conformance sourcecode into that
path on your end... using whatever process you've put in place internally to get
them. Right?

[Ken Russell (switch to Gerrit), 2014/09/11 00:03:26]

It sounds like someone will have to clone Khronos' GLES3 conformance tests into
Chromium's src-internal repository. Frankly, it's quite a pain that the GLES3
conformance tests are not open source. Can you please work within Khronos and
try to get these tests open-sourced? I think the value from the tests comes from
certification, not simply access to the tests' code.

[U. Artie Eoff, 2014/09/11 01:09:19]

That's opening up a can-o-worms ;).  A license to the Khronos conformance isn't
cheap.  I'm not trained in the art of lobbying.  But I'm sure between the "all
of us", someone could persuade them on this proposal.

[Ken Russell (switch to Gerrit), 2014/09/11 01:25:17]

I'll discuss this with some Khronos members and would request that you do the
same.

[U. Artie Eoff, 2014/09/11 16:50:52]

I appreciate that.  I'll defer to @chadv on my team to bring it up to Khronos.

+]