Bug 1679693 - Update WebGL 2 to allow drawArraysInstanced with no non-instanced active attribs. r=lsalzman

Differential Revision: https://phabricator.services.mozilla.com/D98112

dom/canvas/WebGLProgram.cpp

@@ -682,7 +682,7 @@ webgl::LinkedProgramInfo::GetDrawFetchLimits() const {
     }
   }
 
-  if (hasActiveAttrib && !hasActiveDivisor0) {
+  if (!webgl->IsWebGL2() && hasActiveAttrib && !hasActiveDivisor0) {
     webgl->ErrorInvalidOperation(
         "One active vertex attrib (if any are active)"
         " must have a divisor of 0.");

dom/canvas/test/webgl-conf/generated-mochitest.ini

@@ -5392,7 +5392,6 @@ subsuite = webgl2-core
 subsuite = webgl2-core
 [generated/test_2_conformance2__rendering__instanced-arrays.html]
 subsuite = webgl2-core
-fail-if = 1
 [generated/test_2_conformance2__rendering__instanced-rendering-bug.html]
 subsuite = webgl2-core
 [generated/test_2_conformance2__rendering__instanced-rendering-large-divisor.html]

dom/canvas/test/webgl-conf/mochitest-errata.ini

@@ -170,8 +170,6 @@ skip-if = 1
 [generated/test_2_conformance2__rendering__blitframebuffer-resolve-to-back-buffer.html]
 # ABORT_ON_ERROR
 skip-if = 1
-[generated/test_2_conformance2__rendering__instanced-arrays.html]
-fail-if = 1
 [generated/test_2_conformance2__rendering__vertex-id.html]
 fail-if = 1
 [generated/test_2_conformance2__transform_feedback__too-small-buffers.html]