Workaround for Intel 6xxx clear to 0/1 bug

gpu/config/gpu_driver_bug_list.json

Index: gpu/config/gpu_driver_bug_list.json
diff --git a/gpu/config/gpu_driver_bug_list.json b/gpu/config/gpu_driver_bug_list.json
index fc000b885b9ae1766823264adff1a71b73e349f7..195507a48140a10b513122a59a3dd86ac0d1b039 100644
--- a/gpu/config/gpu_driver_bug_list.json
+++ b/gpu/config/gpu_driver_bug_list.json
@@ -1,6 +1,6 @@
 {
   "name": "gpu driver bug list",
-  "version": "10.17",
+  "version": "10.18",
   "entries": [
     {
       "id": 1,
@@ -2573,6 +2573,23 @@
       "disabled_extensions": [
         "GL_EXT_multisampled_render_to_texture"
       ]
+    },
+    {
+      "id": 236,
+      "description": "glClearColor does not always work on Intel 6xxx Mac drivers",
+      "cr_bugs": [710443],
+      "os": {
+        "type": "macosx",
+        "version": {
+          "op": "<",
+          "value": "10.12.6"
+        }
+      },
+      "vendor_id": "0x8086",
+      "device_id": ["0x1626", "0x162B", "0x1622"],
+      "features": [
+        "clear_to_zero_or_one_broken"
+      ]
     }
   ],
   "comment": [