Backed out changeset 42af702edce0 (bug 1403484) for frequently failing mochitest-gl dom/canvas/test/webgl-mochitest/test_capture.html on Windows 7 debug. r=backout

taskcluster/ci/test/tests.yml

@@ -907,10 +907,13 @@ mochitest-webgl:
     suite: mochitest/mochitest-gl
     treeherder-symbol: tc-M(gl)
     virtualization: virtual-with-gpu
+    worker-type:
+        by-test-platform:
+            windows10-64.*: buildbot-bridge/buildbot-bridge
+            default: null
     chunks:
         by-test-platform:
             android.*: 10
-            windows.*: 8
             default: 3
     e10s:
         by-test-platform: