Move dual GPU macbook with Intel HD 3000 out of blacklist.

Instead of disabling all GPU features because Intel HD 3000 is crash prone,
we force Chrome to use discrete GPU.

On the up side, now we can get WebGL back. On the down side, now Chrome on these
macbooks will burn energy more quickly.

BUG=720152
TEST=affected macbook
R=ccameron@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2874163003
Cr-Commit-Position: refs/heads/master@{#471103}

gpu/config/gpu_driver_bug_list.json

 {
   "name": "gpu driver bug list",
-  "version": "10.7",
+  "version": "10.8",
   "entries": [
     {
       "id": 1,
@@ -2447,6 +2447,20 @@
       "features": [
         "avoid_stencil_buffers"
       ]
+    },
+    {
+      "id": 228,
+      "description": "Intel HD 3000 driver crashes frequently on Mac",
+      "cr_bugs": [720152],
+      "os": {
+        "type": "macosx"
+      },
+      "vendor_id": "0x8086",
+      "device_id": ["0x0116", "0x0126"],
+      "multi_gpu_style": "amd_switchable",
+      "features": [
+        "force_discrete_gpu"
+      ]
     }
   ],
   "comment": [

gpu/config/software_rendering_list.json

 {
   "name": "software rendering list",
-  "version": "13.6",
+  "version": "13.7",
   "entries": [
     {
       "id": 1,
@@ -1013,7 +1013,6 @@
       },
       "vendor_id": "0x8086",
       "device_id": ["0x0116", "0x0126"],
-      "multi_gpu_category": "any",
       "features": [
         "all"
       ]