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 db82d1930470c41a0a3cf13b74df42ce1cb00506..d7c3241cce87fa6384c0183dc1dc0cbe1627ef7c 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": "10.15",
+  "version": "10.16",
   "entries": [
     {
       "id": 1,
@@ -2524,6 +2524,23 @@
       "features": [
         "disable_delayed_copy_nv12"
       ]
+    },
+    {
+      "id": 234,
+      "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_boundary_values_is_broken"
+      ]
     }
   ],
   "comment": [